TV's.
ummm, because it is a great game and the only way to play it "on the go"? Besides, it costed much more than this for the original game (the switch versions has all the expansions, etc), and it was first released on 2012 so it is 6 years old and not 10.

And the gameplay is pretty much timeless as people are still playing it today, whether on PC or the other consoles.

I would definitely pick this up if blizzard decided to enable cross-play, since most of my friends are playing the PC/Mac versions.
oh btw, "do you guys not have phones?" XD