It's a pretty good day for shopping, especially ETH looks very attractive after hitting the new low since the exponential rise last May. At the moment of writing this message it's at 216 USD on GDAX.

I am pretty sure it will move back soon to the "300ish" range. If they move to prove of stake, that means more people will be holding it and thus not using it in order to earn interest.

Less liquidity = higher price.

If they stay with "proof of work", it's also logical to assume, the harder it will get to mine the coin, the higher will the price be.

Well, I did buy some ETH on today's sale :)