You're telling me that they couldn't have come up with a similar system for the PS3 had they started at the exact same time with the exact same goals in mind? Ridiculous. In the most basic breakdown: a band writes a song, the song gets charted, people buy the song and the money gets split properly.
I understand that the PS3 couldn't possibly do it like the 360 does it, but you're saying that despite the fact that the music and the chart are both identical that Harmonix and Sony couldn't have developed a system to get that music out to us to buy and to split the money properly with the bands? Nonsense.