No, not "is WoW coming to Stadia" but rather I wonder how much Blizz is looking at what's being done with Stadia, especially as Google iterates on the platform to make it better.
I mean for the most part WoW isn't handled locally on your computer. You download a bunch of art files and sounds and then it's just down to input lag.
So what would be the downsides and upsides for WoW (or any MMO really) to swap to a streamed game?
Pros:
Protection from Data-mining.
Protection from weird addons that you might not want.
Players all get to play on the "best" settings.
Wider audience where you can basically have people spend $75 on a bluetooth keyboard and mouse with a dongle like a fireTV or chromecast rather than $400+ PC.
Cons:
Lack of addons - specifically in WoW - would be contentious since much of the audience requires those addons to perform at all. (Tell your guild you don't use weak auras and have a stock UI and see what response you get.)
Might require even heavier sharding for zones with multiple things going on and huge numbers connected. Think Crystalshard Dalaran levels of lag.
Less input for UI enhancement without a large modding community to draw inspiration from.
So is a possible WoW streaming service in the offing? Would you be willing to sign up for it? Would you expect to pay the same for it or would expect to pay more or even less?