Never happen more draconian restrictions worldwide by governments against their citizens is more likely than letting adults make their own choices,rules from region to region have a serious amount of variance in them doubt that will change.
Then certain sites just do not provide a service in certain regions complicating it further whether it is legal or illegal makes no difference if can not use it and log in.
I think that in 10-20 years, poker and other games of chance will be legalized in most countries of the world. Given the development of Internet technology and online gaming, this is simply obvious. At least I don't see any significant obstacles to legalization in the next decade.