Polaroid is set to introduce an ink-less instant photo printer, the PoGo. This relies on technology from Zink that uses heated heads to produce colors in special paper.
One day, photo studios will become redundant, at least for "ordinary" prints of small sizes. The combination of simple digital cameras with DirectPrint (or its equivalent), cheap, good quality photo printers (inkjet or inkless), and extremely simple to use, but very feature rich photo editing software will make them so.
Guess the day is not far when printers will come built into cameras (like the Polaroid) so that one can get post card prints directly off the camera. Of course, there is a long way to go before we get prints that are as good and durable as the ones you get from the professional studios.