One decade later: 1 GbE means hosts are capped at 4 to 6 simultaneous 4k bluray streams, or loading a single 400GB game per hour. Still fast enough for most consumers. Outside of a home lab, only maybe a NAS and one or two hosts transferring lots of bulk data there need bigger pipes, and even then 10GbE usually means "throttled by disk speeds or computational protocol overhead" (e.g. Samba on a slow CPU; anecdata: I see about 200MB/s over SMB on my 10GbE fiber link, but invested zero time in optimizing things). And in professional environments I'd be surprised to see 10GBASE-T instead of an equivalent fiber (less power draw = less heat, also better scaling; only drawback might be when replacing legacy copper cabling).