My Note 3 works just fine with gloves on (there's a screen sensitivity mode intended just for that use-case)...and I'm not talking about using it with the pen.

Touchscreen tech has advanced quite a bit since the old days.

The demos of the watch show a mixed use-case. The crown for some things, the screen to complete the task. So unless they're supporting similar screen tech as what Samsung is featuring now, the glove use-case doesn't matter.