I meant to look around at several stores today, but only ended up making it to two.
At one of the local Edion stores (Best Buy-ish) with a smallish game department they had at least seven machines left at 5pm. At a local game store they had four machines that I could see around the same time.
The better gauge is the mega stores like Yodobashi or Bic Camera that have their systems clearly stacked behind the counter, but I didn't make it to any of those today.
What is still so striking to me is the insanely Western bend of the launch lineup.