Just what you always wanted, right? Have piano, will travel. Hardly rolls off the tongue though. Well, say hello to the laser-zapper Vertual [sic] Piano from a company called Digital Information Development, or DID.
The VP uses red semiconductor laser beams to project piano keys on a surface of your choice - any non-black surface, that is. You get a 25-key, two-octave keyboard with a CMOS camera and IR module that lets the device know you're pounding out Beethoven's Fifth.
You can also use the VP as a harpsichord, pipe organ or organ. And all this can be done via the 10x3x3cm… er... beaming device-thingy for ¥15,000 ($131). It weighs just 100g and should be in shops around November.