The voltage and the power consumption is a little bit near in s7.. did you try s9 how about the noises??
No one has a clue on the noise factor seeing as Shipping starts from 12 June.
Given the similarity in design and power consumption to the 2-fan S7 models, on CAN estimate that the noise level will be about the same.
I don't see any reason Bitmain would have changed fans, given they seem to have a ton of them on hand and have been using the same fan model for years now.
I am happy I decided to wait - I will NOT put up with "antpool only" restriction on this miner, Bitmain OR SOMEONE needs to fix that before it becomes a viable product (over and above they need to get the price down some).
Wifi is an unneeded expense for most miner units - if YOU want it, it's fairly cheap and easy to add an Ethernet <-> Wifi adapter.
USB - I'm pretty sure the controller CPU board they use has a USB port, shouldn't be hard to add a USB-Wifi connection if YOU want that.
Hint - most SERIOUS (read "large farm") operators DO NOT USE WIFI, as it flat out won't handle enough connections and isn't RELIABLE enough for large-scale deployment.
Even a lot of us HOME miners don't want anything to do with WiFi.