Takeaway: Some but not many locations will support AR/VR servers in 2020-2022. The good news: It works. 5G + Edge Cloud networks are starting to deploy with 15-25 ms latency.  Where fast enough, you will be able to move all your calculations to high-capacity servers which will do all the calculations and just send the picture to a lightweight headset or phone. Major companies including Tencent, Niantic Pokemon, and Verizon are already testing. Experts think quality VR will require 10-20 ms latency, right on the edge of what's coming.

The rest of the story. 1-5 ms is often promised. (URLLC) It works in the lab but is years away from meaningful deployment. Sorry. The best available in the next few years will be Level 2 Edge clouds, relatively close to the user, delivering 15-25 milliseconds. Deutsche Telekom has begun deploying a Level 3 Edge cloud, further back in the network, 20-30 ms. Without an Edge cloud, 5G latency should be 30-45 ms. Today, a decent LTE network is 45-55 ms average.

Unfortunately, this will only be available in limited areas for years.  China and Korea will move quickly starting late in 2019. Both nations should be mostly covered by 2020-2021. Few others will have wide deployments until 2022-2025. Verizon is one of the first to deploy real 5G. Its goal is a quarter of the U.S. by 2022-2023. 

Verizon will be ahead of most others. T-Mobile U.S. promises to cover the whole country in 2020, but it is using low frequencies with LTE-like performance. In addition, for good AR/VR you need mini datacenters fairly close to the user, perhaps at the local exchange. Few of the 5G telcos are committed to those servers. Verizon says they will start reaching customers late in 2019. AT&T is only testing and officially is uncertain. The Europeans are mostly further behind.

dave ask

Newsfeed

The 3.3-4.2 spectrum should be shared, not exclusively used by one company, concludes an important U.S. Defense Innovation Board report. If more wireless broadband is important, sharing is of course right because shared networks can yield far more

It does work! Verizon's mmWave tests over a gigabit in the real world. 
The $669 OnePlus 7 Pro outclasses the best Apples and probably the new Galaxy 10 or Huawei P30 Pro. Optical zoom, three cameras, liquid cooling, Qualcomm 855 and more.
Korea at 400,000 5G May 15. Chinese "pre-commercial" signing customers, 60,000-120,000 base stations in 2019, million+ remarkable soon. 
5G phones Huawei Mate 20, Samsung Galaxy 10, ZTE Nubia, LG V50, and OPPO are all on sale at China Unicom. All cost US$1,000 to 1,500 before subsidy. Xiaomi promises US$600.
Natural monopoly? Vodafone & Telecom Italia to share 5G, invite all other companies to join.
Huawei predicts 5G phones for US$200 in 2021, $300 even earlier
NY Times says "5G is dangerous" is a Russian plot. Really.
Althiostar raised US$114 million for a virtual RAN system in the cloud. Rakuten, Japan's new #4, is using it and invested.
Ireland is proposing a US$3 billion subsidy for rural fibre that will be much too expensive. Politics.
Telefonica Brazil has 9M FTTH homes passed and will add 6M more within two years. Adjusted for population, that's more than the U.S. The CEO publicly urged other carriers to raise prices together.
CableLabs and Cisco have developed Low Latency XHaul (LLX) with 5-15 ms latency for 5G backhaul,  U.S. cable is soon to come in very strong in wireless. Details 
Korea Telecom won 100,000 5G customers in the first month. SK & LG added 150,000 more. KT has 37,500 cells. planning 90% of the country by yearend. 
The Chinese giants expect 60,000 to 90,000 5G cells by the end of 2019.
China Telecom's Yang Xin warns, "Real large-scale deployment of operators' edge computing may be after 2021." Customers are hard to find.
Reliance Jio registered 97.5% 4G availability across India in Open Signal testing. Best in world.

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Welcome On Oct 1, 2019 Verizon turned on the first $20B 5G mmWave network with extraordinary hopes. The actual early results have been dismal. Good engineers tell me that will change. Meanwhile, the hype is unreal. Time for reporting closer to the truth.

The estimates you hear about 5G costs are wildly exaggerated. Verizon is building the most advanced wireless network while reducing capex. Deutsche Telekom and Orange/France Telecom also confirm they won't raise capex.

Massive MIMO in either 4G or "5G" can increase capacity 3X to 7X, including putting 2.3 GHz to 4.2 GHz to use. Carrier Aggregation, 256 QAM, and other tools double and triple that. Verizon sees cost/bit dropping 40% per year.

Cisco & others see traffic growth slowing to 30%/year or less.  I infer overcapacity almost everywhere.  

Believe it or not, 80% of 5G (mid-band) for several years will be slower than good 4G, which is more developed.