The market wont change extremely fast though. The max racer demo from the guys at Alternativa (http://alternativaplatform.com/en/demos/maxracer/) is a 140 mb load using high quality textures. If console/pc games get ported to flash they are still huge, into the gigabytes. Nobody is going to load that into flash. What however is possible is a streaming system. But even then the loading times would be massive and probably very annoying.
It will take the internet some time to grow its average connection speed. Yes there already 120 mbit connections but the average user doesn't.
