Well there was actually an interesting video on you tube about the mixing of the songs - Rock Band and Guitar Hero actually sounded better than the fuzzy warbles that professionals pass off as a good mix these days. So if you play these games, you actually get a meatier version of the song compared to the album version - as each part has to be distinctive. As I said though, the comparison video on youtube showed just how much nicer it sounds without all that extra filtering and engineering.
I like nothing better than visiting my mates, and playing Rock Band at crazy volume - it's become the best way to actually enjoy music. Music these days is disposable, cheap, and not very well respected IMO. When you have to save money to buy that album, it means much more - when you have to take care of it, it means much more, and when you have to do something besides click a button to listen to it, it becomes a ritual. I miss vinyl - not the sound quality so much as the ritual. Taking an LP out of it's sleeve, wiping it with the anti-static brush, setting it up on the turntable, then crackle, and you've got 30 minutes or so of music. But it's 30 minutes of music that you'll sit down and enjoy, actually listen to it and pay it the respect good music deserves.
My point is that, with rhythm games we get that back a little. We have to set up guitars and drums and microphones - we have to then decide on a playlist, look for a good collection of songs. Then when you play it, you have to listen to the music, you have no choice but to play along - it's like enforced enjoyment. But at least it is enjoyment.
I listen to music all the time, and it is thoutless backing music to keep my neurons firing when working - but I look forward to playing Rock Band because it feels more like music, music without effort is stealing

. I got the Pearl Jam Ten album and made my friends play the whole thing in one sitting - it's the most fun I've had in ages.
People who scoff at these games need to realize that we do not have the time to learn guitar - if we did, then there would be something very wrong with society. There's too much snobbery from people who really shouldn't be like that. My son started out with GH2, and now he plays guitar in a band. It can get people interested more in music, but if it doesn't, those haters should just let us alone to pretend we can play. If a guitarist plays a computer game, we don't instantly tell them they should be able to make their own games, do we?. I've yet to meet one actual musician who feels that way AFTER playing Rock Band. A lot of my friends are in bands, and they all love it, no snobbery thank frak.