Seeing how only 3 of the ones I listed are out, that's what I assumed you meant, sorry.
But that would apply to all the consoles... and that's why I like games like GH3 and RB that are good for boring transition periods where no good games come out. And most people getting gh/rb attempt to achieve getting to expert and 5 staring those songs, that's the whole point of the game. Sure it takes a long time and a lot of practice, but people get there eventually.
I started with GH2 on the 360 on medium, moved to hard and got pissed that it was too hard for me. Picked up GH3 and started on hard, and now i'm playing on expert and doing pretty well, and I know a lot of people who like getting better at the game (and rock band especially since it's even more of a party game) because it's actually fun.