Despite the massive success of the Guitar Hero/Rock Band video-game franchise, there are still plenty of folks out there who want to learn how to play a REAL guitar. And while you can teach yourself from a book, or even an online system, you're still splitting your attention between the tutorial and your axe.
That seems to be the design philosophy of i-Tab, whose US$199 gizmo clamps onto your guitar's tuning head and gives you a "head's-up" display of scrolling chords, tabs, even lyrics.
The units are scheduled to begin shipping in mid-March, and will hit your local Guitar Center come April. Personally, instead of dropping two large on this stand-alone device, we'd be more interested in a universal clamp and iPhone/Android-app package. That would be (you'll pardon the pun) music to OUR ears.