Ethereum finally starts to switch to Proof of Stake. What do you think, what coin will abandoned miners find instead?

As recently posted on this subreddit, Ethereum has just launched first testnet for PoS update. When the update goes completely live, the miners will become literally obsolete - no compromises.

So now we have two warriants:

• Miners resigned!!! Everybody sells graphic cards to public! Gamers happy as only Bitcoin farms remain!

or

• Miners switch to other remaining PoW coin, and surrounding press is making it go crazy.

While lots of everyday people would like the first to happen, I think that the latter is way way more realistic.

But what coin it could be? Will miners switch to Bitcoin and concrete it even more? Or will they go for Ergo, that is slowly setting down and is going to make payments less while reducing the possibility of mega-mines? Then we have Litecoin, Monero and after it... a huge list of lesser known coins.

What is your take on this situation? I'd personally love to see Ergo skyrocket, but it's only my early investor's hopium, realistically I think that everybody will just switch to Bitcoin.

EDIT: Someone just told me the difference between Bitcoin and GPU mining, so I edited the post :)