I think most people are under the belief this will be a quick dip and therefore "look at the long horizon".  If it doesn't come back in a couple weeks (I personally don't think it will) then we will start to see an impact in GPU prices.  For a while there, people could buy miners on a credit card, start a farm, and then repay the debt with cash flow generated..... well that isn't happening at the moment.  This will take a number of people out of the market. 

I, unfortunately, bought some expensive cards as the prices were rising.  I was in a hurry to finish the rig and ended up 1 card short.  I'm in a holding pattern at this point and will be waiting for the crypto prices to impact the GPU prices.