Fancy numbers, but they're incomplete. What was the total cost for this 2 year exercise if a ordinary human with a soul sat down and paid for every watt - how much did this PDF experiment cost? The maths has been clear about this for a very long time, google is drinking cool-aid if they think this means anything more than what has already been discussed or discovered.
Let me put it another way, in recent history the A+B=C mathematical formula was proven by a reclusive Japanese mathematician. Have we stopped using RSA keys? Has the banking system been completely replaced with mathematics which does not fall victim to this proof? No. And they wont. 1100 GPU years means nothing unless you're the one paying the bills.
Google needs to start hiring humans with brains that can think - and better yet, some grey hairs from working in IT.