icoustic guitar with built in speaker

[PhilHunt]

Has anyone seen this setup before? It's been out for awhile. You can hook up an ipod to it or a midi and it has a speaker in the soundhole and it amplifies itself....no amplifier needed.
My only question is: Why are they building the units in small travel guitars and not full size?

http://www.icoustic.com/Home_2.html