Will there be any compatibility issues with regards to Windows 10 when it becomes available at the end of July? I'm considering upgrading and this could be a potential deal breaker.

There is always the option to play via facebook, then it's platform independent. I've done it a few times and it works well enough I guess (I like my tablet better).

I'm tempted by the free upgrade offer, but I'm no hero, and I don't want to find all the win 10 issues.