What is Theo Randall talking about? How much more ingredient-driven can you get than “A big, ripe, yellow Italian peach” for dessert as at The Dock Kitchen? And when we go to a 'proper' restaurant do we really know anything about the provenance of our food? Theo's comment shows insecurity if you ask me....
I think there's a big difference between 'popping in' to Selfridges to get the chance to sample the food of a culinary legend that doesn't cook full time anymore and 'popping in' to sample the food of a couple of amateurs that have opened up their front room to all-comers. The former I would pay through the nose for; the latter is a non-starter for me.
Pop-up restaurants can be great, but surely they will take business from established places, which can't be good. Also, you mention about good value, Koffman wasn't cheap!
Aren't pop-ups just turning into restaurants that get all of the benefits (low overheads, everything you mention) and not many of the disadvantages (maintaining custom and staff, rent, etc) and then still get to charge restaurant prices? Pierre Koffman was advertised at £75 a head, The Dock in Portobello has main course dishes for over £15, which is more than your average gastropub. Aren't they just becoming a rip-off while taking advantage of our constant desire for the new?
I am loving the idea myself, and I am trying to start something in Newcastle. www.thenextbigevent.moonfruit.com