It is solved, it's just that USA is held back by a braindead telecom-structure, this is political barrier not a technological one.
Here in Norway, I've got 4-5 different technologies to choose from, that all trump what you've got. First there's ADSL and ADSL2, the former ain't much better than what you've got, stopping at around 2M/512kbit, but ADSL2 is available up to something like 10M/1M, which is already a significant improvement.
With similar speed, there's mobile broadband, 2-3Mbps download and 500kbps upload, it's got worse latency though so no good for gaming. (but nice in working also when you're traveling)
Then there's internet-over-coax, i.e. alongside cable-tv, this offers speeds up to 50Mbps, though the most popular offering is 3.5 or 7Mbps.
And if none of that will satisfy you, get fibre-to-the-basement with physical capacity for several Gbit/s, but actually offering internet-speeds of up to 100M/100M (i.e. symetrical) to private homes at the moment, the lack of higher speeds offerings if from lack of demand though, not because of any technological restrictions on the last mile.
Most people settle for something in the 3M to 10M range, though, I've got fibre, and that's the most popular solution, but even a 2-nerd household like mine don't really have a reason for more than 25M/25M, so that's what we have.
The same technologies would work fine in USA too -- if only the political barriers of the entrenched telecom-monopolies where removed.