As you collapse the guitar neck using its folding mechanism made of aircraft-grade aluminum, the strings roll up into the guitar. Then when it's time to lay down a few tunes at your destination, this baby goes from backpack to unfolded guitar in 20 seconds[Source 1 - 2]
How much would you pay for one of these babies? This god of a man sacrificed his NES, the best system evar, to make a freakin' awesome guitar. Unlike the Halo fanboy who made the rocket launcher, this awesome project is actually functional[Source 1 - 2]
MegaDriverHave a broken SEGA Genesis laying around? Then why not turn it into a functional electric guitar, like the modder above.
Touchscreen GuitarPhil decided to install a Kaoss Pad directly onto his guitar. First, he needed to find a guitar with enough space on the body (Epiphone Les Paul Special 2) and then he custom mounted the touchscreen. More information here.
The Kaoss Pad is a touchpad MIDI controller, sampler, and effects processor for audio and musical instruments made by Korg[Source]