I think foveon has something to offer..
However sigma are dead set of making people pay a serious premium for it, and its not so good for high ISO work. But the technology is interesting.
Look at the SD14, IMO clunky camera design, big big price at launch (it was well over £1000) in the UK, now its just sold off in the bargain basement. I dont know what is up with sigma, they did some ok film SLR cameras in the 90's.
Maybe the Dp-1 will have its fan base, and maybe its destined for the same stock clearance sell off as the SD14. Sigma have failed to bring foveon to the market in an impressive way. What's the bet that someone does a bayer APS sensor compact soon???