That’s not an issue for current WiFi with the proper kit. The Whitchurch Legion regularly has over 100 people each weekend evening accessing the internet via two £60 300N units.
As for speed, for most people at home it only needs to be faster than the stream or internet uplink. It could offer better coverage, but again properly designed units can do this today or (more commonly) it’s an environment issue.
Remember all these claims were made for AC and N before it, we will probably get the same half arsed implementation in cheap ISP kit. BT, TT, Sky and Virgin are all complaining about each others misleading adverts, which they all are IMO.
So don’t fall for the hype. If you have an issue it’s probably not going to magically solve it. The biggest issue domestically is the WAP is just in the wrong place in the house. It may be convenient for BT / Virgin to put their external connection there but that’s it. I’ve even seen a new build this year that doesn’t have mains anywhere near it!
However for large scale and / or specialist implementations it opens up all sorts of opportunities.
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