Not sure why it keeps getting bandied about, this "poker @ olympics" question. It's not a physical sport, not even close to the same vein.
As far as different countries having good players and how they would stack up, well, it's already a thing with
wsop, WPT etc. No restrictions on entry, I see plenty of players representing their country/culture etc. No reason to look at the Olympics as an option when we already have a world wide event right?