Realworld likely speeds of 50-150 megabits 90+% of the time. Two 20 MHz bands will deliver speeds like this. You rarely will need that kind of speed but higher capacity wireless means more bandwidth for all. The 2 gigabyte and 5 gigabyte caps need to disappear and they will where there's enough competition. 55% of Singapore is covered now and they'll be close to 100% next year.
Update 3 September: Vodafone in Spain announced a similar 300 megabit (shared) deployment rapidly going countrywide. By December, Voda will have 4G to 100% of Spanish towns of 25,000 or higher.
Rwanda will soon be supporting 750 megabits, as they build a network that can aggregate 5 carriers. The Africans look to leapfrog the west as they have plenty of spectrum available. There are very, very few phone wires in sub-Saharan Africa so the service will be wireless and they intend to make it efficient.