Re: "Gigabit class wifi"?
As a few others have alluded, it's not that people are in need of a sustained 1gbit for hours on end for $task, it's that some limited tasks become much smoother with a higher speed connection.
Take even streaming video now at 1080p. Might only need 20mbit; but if your player wants to buffer 10 seconds of video in RAM before it begins playback, the time it spends buffering will drop to almost near-zero with a gigabit connection.
I write this from the lucky position of having Hyperoptic* 1gbit internet. I've found that I've stopped really caring about 'the internet' in terms of speed, stuff just works. If I'm sending a multi-GB file to cloud storage, it's done in barely no time at all. If I want a 15GB patch to download, it's done in the time it takes to make a cup of tea. A friend of mine languishing on 10mbit ADSL has to leave his computer on most of the day to grab the same updates in time for a gaming session in the evening.
it isn't that I need to shift 50TB of data a month, but that the data I do transfer, I don't want to wait for. I now don't have to.
(*Granted, the speed is lovely. Pity they still haven't rolled out ipv6 to me, nor can they offer a date when it'll arrive....)