This approach is patented and currently marketed by a number of machine producers. I can't foresee these making it to market. Also, a lot of the features offered by the more expensive existing printers revolve around lifecycle management of the vats/equipment. You would be amazed at how many things go wrong with approach unless you have the right controls in place.
The resolution is awesome, but the resin is ridiculously expensive. I'm holding off of this until the Reprap community has a chance to genuinely open source this sort of technology.
DLP printer handling is already in the latest open source slicers, but the hardware spec is wide open right now. At the moment, you'd need to be careful with Junior's printer to avoid the 'suction effect' and/or have too-heavy models fail in printing.
I don't think it'll be too long before resin passes up filament in hobby printing popularity, though.