What DigitalGuy said. Gamefly needs to make an agreement with the console makers to do it. The consoles today already have fully downloadable games from the Marketplace. If gamegly does do it then they need to share the profit with the console maker. If you want a streaming game service try Onlive, you can stream game demos and games to your PC or TV. If you do it on a PC you dont need a good one since the hardware is already there but youre just running off your computer.
Every one has their opinion. Most of my xbox friends says "PS3 is weak", when I go on my PS3 they say "Xbox has no games, xbox sucks, etc." My personal opinion is that they're are both great consoles but have there pros and cons. If I would have to choose, I would choose Xbox because of the Party chat and I know a lot more people on there.