I have been doing this in DC. I call it the ski treadmill. It is most certainly eye opening.@Bill Talbot We spent a little time on a carpet in SF after I got new boots last year while we were playing around with my LLD and canting. It was an eye opener because the carpet magnifies things that you don't think of when you're out enjoying the snow and sunshine.
My boots have never been more dialed.
I can't comment on ski shortcomings, as much as the new boots that needed alignment addressed.Like Tricia said, the ski treadmill does amplify any shortcomings.
I guess that is good for learning. It is quite hard on the ego.
My thoughts FWIW.
I have been doing this in DC.....