If you can't think of a reason you need the current speed, let alone faster speeds, then you are not using the right mindset. While I agree there isn't much need for a phone, or iPad or Apple Watch to have multi-gigabit wifi, there sure is a need for production devices to have it.
There is a lot more to "networking" than internet. Example, an editor working at home may need to move 60GB video files around from a server on to a laptop. Sure the NAS has a 10GBE ethernet jack, and sure your home is wired for 10GBE (I mean 2.5Gbe is the bare minimum these days for home networking, really 10Gbe is the way to go) so finally you can roam around your house and edit from anywhere on your laptop. Finally you can stream multiple 4K or higher videos off that server to multiple TV's at once. Finally wireless 8K is possible without lag. Sure if you're a gamer you will always prefer a hardwire (ping time is always better over copper!) but for most average users finally having speeds that are acceptable will be a welcome change from the drudgery slow wifi 5 & 6 that most of us are on now.
Basically if you can't imagine a use for it, then you probably don't need it. Doesn't mean its bad. Some of us are very excited to finally get potentially useable speed from wifi and no longer be tethered by copper to desks.