It will be able to run android apps, any steam games, and because it’s going to run Steam OS, you can run lutris or heroic launcher as well. So emulation and a whole variety of older games.

Also because it’s a stand alone, but can pair to a pc, you will be able to work straight on it with KDE desktop and whatever applications you want to run.

You can buy it anonymously, mostly through P2P exchanges and markets. But simply buying bitcoin or some other popular coin with fiat, then exchanging that to Monero and using that to buy your privacy things will work as well.

Monero is very private and anonymous.