Originally posted by: everman
You can get it today if you move to large cities in Japan, S. Korea, and Singapore. The reason why it's not readily available in the U.S. is because of low population density.
That's one big reason, but another is that other countries weren't early adopters for the most part. It's costly to redo the infrastructure needed for the higher speed connections. Other countries were comparably late to the game, but it paid off because it's allowing them to ramp up their speeds cheaply and not have such a costly adaption of the technology required. Another thing that has to do with it is government subsidies and other incentives that are provided, such as Korea's case.
Another possible explanation is the lack of competition. There's a relatively large entrance barrier. In my area, before FIOS became mainstream, if you wanted high speed internet you went with Cablevision. Verizon was as expensive for lower speeds, and simply did not offer higher speeds at the time. Now Cablevision is bleeding badly to them. It's a no-brainer when you can get 50mbps connections for $60/month + taxes through Verizon and paying more for just the 30mbps from Cablevision. Not to mention the dishonest business practices Cablevision is known for, such as capping your connection if you upload for an hour or more straight.
EDIT: Just looked up the price for 50mpbs here. The website said it's now $90/month, but they've been running promotions over the phone for $60/month to compete with Cablevision.
the two packages we have to choose from for the highest speed are:
Cablevision: 30/5 $45/month for the first 6 months, I believe $70/month after that.
Verizion FiOS: 50/5 $60/month for the first year. $90/month after that.