The X-Keys from CME we saw last year and were impressed with the $99 USB keyboard with polyphonic aftertouch at that price. With only two octaves though the playable surface was not so useful for anything other than small parts.
CME have brought a 37 key X-Keys version to the show which makes things a lot more interesting for the player. Also tested with up to 7 devices linked to an iPad!
Available later this year, price TBC.