Cable wireless will be "humongous," in the U.S. a cable VP tells me. The cable buildout appears inevitable. I see evidence of that at every wireless event. One possible roadblock: wireless incumbents offering cable an almost unbelievably cheap deal is a rational business move.
The marginal cost of bits on wireless is falling 40%/year and is already very low. If cable is coming in anyway, a telco like Sprint or AT&T could offer a resale deal not far above the cost of cable building their own networks. No one at the telcos has suggested this would happen, but the possibility belongs in the analysis.
The cablecos are moving already. I see Charter ads in the New York subway. C & C are offering attractive deals to their existing customers, the majority of the population. Both are reselling Verizon service for now and moderating their growth while they build systems.