Ding Wenhua tells me China will distribute the coming generation of TV, UHD, at 36 megabits. Bell Canada intends to use 24 megabits and I believe most in the U.S. 15-25 megabits. The comparison with America is mine. Ding merely provided his specification; I drew the conclusion.
The actual difference in the picture will be modest; most networks are sacrificing a little quality to save money. You'd have to look closely at an excellent TV to see the effect. It remains an impressive achievement.
China can support the higher data rate because of the extraordinary broadband network they have built in the last six years. 344 million homes have been connected directly to fiber, most capable of a gigabit. China Mobile continues to add four million more fiber home connections each month. That rate must slow soon: there are only 455 million homes.
Not long ago, many of those homes were effectively limited to speeds under 50 megabits by insufficient backhaul capacity. The situation has improved dramatically in the last year or two. A friend in Shenzhen tells me 500 megabit service is common in her city.