I was hoping it would have a bit larger build plate, this looks comparable in size to the original photon. A mono X Sized plate would be nice but I imagine that's probably in round 2.
The detail seems very promising, especially for N scale applications. Even at 80 microns for the resolution the more controlled light does edge out even the best of the LCD variety.
Pricewise, I'd be hard pressed to go for this over a mono X based on the size aspect alone, if we were talking 399 then I'd personally be weighing a decision between the two pretty heavily, and perhaps retiring the Photon S to swap one of these into the stable for small bits and pieces.