I have been playing guitar since September 24th, 2003. And ever since I played the first guitar hero game in 2006, I was thinking "I wish there was a game that let you use a real guitar, some how!"
And as an actual musician. When the game comes out I will be determind to get. EVERY. LAST. ACHIEVEMENT.
There's probly going to be that ONE achievement that's always a pain in the ass, like "Play the solos from the following songs with your guitar flipped upside down; Don't stop Believing (Journey) Hotel California (Eagles) and Bark at the moon (Ozzy Osbourne)
^ That is the only achievement I would not go for. Unless people actually started getting it. I can play guitar... right handed. But upside down AND left handed. No thank you.