1-3 of 3 Answers
Google has stated that this will be the first Chromebook to ship with Android app support already onboard.
Android apps are in beta on the stable channel of Chrome (if that makes sense). They work out of the box. Most work really well, but there are some that don't.
I'm pretty sure I read somewhere that the play store will come out of beta prior to the release of the Samsung Chromebook Pro. But I've installed a few games just for messing around and everything has been pretty smooth so far.