I seriously doubt there will be a diff climb because of these miners. They aren't more efficient than GPU's. As a matter of fact rigs running 1080ti's with the Eth Enlargement Pill are probably quite a bit more efficient and hash better than these by a decent margin. I don't have any 1080ti rigs running to run the numbers, but at initial glance that would appear to be the case. I am sure someone who is running those rigs can chime in and tell us their experience.
So I don't think these rigs are going to do much if anything on the ETH network unless they are selling them like gangbusters which from looking at the batch number increase, but the dates stay the same it would imply they may not be selling as fast as Bitmain had hoped. I think the fear of ASIC's can be warranted when the technology disrupts the status quo, but in this case it didn't as these did not change the hash rates or economic factors for mining Ethash. I don't see how the fear in this case is warranted.
btw, I haven't gotten my shipping notice yet for mine.
Received my B1 Shipping notice yesterday. Should be delivered Tuesday.
RE: 1080TIs
Can confirm 310-313MH@1109 Wall Watts.
4 x MSI 1080TI Founders
2 x ASUS 1080TI Turbo

Back in early 2017, bought as many Founders cards as possible. The per-slot deployment cost was only marginally higher given we could push 42MH per card at the time. ETH Enlargement gave us P104+ performance on the consumer cards.
If 580s werent down to $180-$200, the 104-100s would still be a good deal at $600.
Arguably still are, if you want a flexible hash board for shitcoins.
Right now, its still possible to put an 8-card 580 rig that easily pushes 235MH@+/-1200 Wall Watts.
All-in cost should be about $2000, not counting the likely 30-50% resale value youll find on consumer gaming cards.

A few months ago there were some rumors floating that Bitmain were having trouble sourcing DDR, as the risk lots they purchased in Taiwan didnt yield well. With B3 still advertising for July, Im doubting this.
Agree with most though, this should not juke the difficulty too high.
Now if this F3 nonsense is real. Perhaps the 72GB requirement will keep them off net for a while?
https://www.reddit.com/r/EtherMining/comments/88igmr/antminer_f3_confirmed_waiting_for_official/Note: 3GB cards will be dropping off the network in a few DAGs. Ill be curious to see how many large deployment were betting on switching their 3GB P100s to ZCash after the DAG grew.