So... I got Rocksmith.
After fumbling around to find my component cables for my PS3 (I use HDMI... which causes audio lag with the game it seems) so I could put my sound through independent speakers, I hopped into the game, guitar in hand... It's actually quite fun... if a little overwhelming trying to sight read moving, colorful tabulature to songs you've never heard before... But I could see myself benefiting from it in the end.
I'm kind of lazy when it comes to practicing guitar, I tend to skip over all the important stuff because it's boring... having flashy mini games catered to training the skills I skip over most of the time I think will help me out a lot.
...Only downside is, there's really not a whole lot of songs that I really enjoy... I've downloaded the A7X pack, Bring Me To Life by Evanescence (This song is much harder to play than it sounds it seems), and Redneck by Lamb of God (Which I could play previously)... But there aren't many songs that came with the game itself that I'm all that interested in...
Regardless, I'm finding it quite fun... if a little confusing at first trying to keep up with the movement on screen.