Gordon Ramsey has outfitted several restaurants on Kitchen Nightmares with iPhone-based (or other "new gen") POS systems, and I'm interested to see if they still use them.
There seems to be so much going on in this space, especially with the advent of low-cost, high-performance touch devices. I'm a little surprised I haven't heard of some massive win yet, like a major retailer transitioning. Kitchens are at least high-volume, I wonder if they're a good indicator.