I could certainly see a market for a full-frame EVIL camera and a corresponding series of small (since there's no mirror and minimal AA filter) extremely high IQ lenses to go with it - it would be a fantastic travel/discreet camera. At present, there's nothing in the market like it - you have the Leica M9, which costs 8k and has no AF, and you have the myriad crop-sensor compromise designs, but nothing with the IQ of a full-frame DSLR and a decent AFsystem, but a fraction of the size.
Afte all, if you think about it, a DSLR is needed only for action shots, which demand fast, accurate AF. For this, it pays a huge premium in size and weight over rangefinder-like designs, which have the same (if not slightly higher, due to the weaker/absent AA filter) IQ, which are just as capable for landscapes, portraits, macro and, indeed, anything else apart from fast action. A travel photographer, for instance, could carry a slew of compact bodies and lenses, to cover every situation, in the same space it would take to carry a single 5D2 or 1D4, 24-70L and flash - if you aren't shooting action, this would be a far bette use of space. At present, though, there is no digital option to do this, so, for the moment, we are stuck with big, bulky cameras and lenses whose action capability we seldom use.