Well, there are both good and bad sides to this issue. I mean, it would be the end of developers intentionally doing a crappy job on one system to promote the next-gen version (for example, Splinter Cell: Double Agent and Spider-Man 3). Furthermore, it would mean you would only have to spend money on one system. Plus, there would be no rabid fanboys for one system or another. On other hand, yeah, it would also be pretty bad, what with the monopolies and the lack of competitions and the whatnot.