Never mind, got my answer. Severely less than I thought it would be.
One concern is how this would work on women? Still looks big on straps even a smaller version is big.
I wonder what those Pebble folks (who started the modern craze) be thinking right now? Not good I think.
So Apple Pay, a good way to catch up with the rest. Still, NFC will take a while longer before it gets adopted fully.