I don't want to sound like the "Bill Gates 640kb is enough for everybody", but I really struggle to even fully utilise my 1Gbps at home, aside from the odd massive game download or "Linux Torrents."
I mean it's great to download 140Gb or so in 10-15 minutes, but it doesn't really happen that often. Most of the time my line idles around 10-40mbps peaks during regular usage in a household of 4 with pretty much streaming being our only major consumer of traffic.
As content size and requirements evolve 4K+ etc, I'm sure it will start creeping upwards in terms of requirements, but I haven't seen a major game changer that will realistically tax my 1Gbps service up to even 60-70% of capacity in a constant basis.
Unless you're downloading the internet. Or have specific requirements for major media upload/downloads such as is required for
@jannier 's occupation.