first of for the record, internet speeds are measured in bits per second this is also the case with video, but not everyone is a movie head. ergo a 60mbps connection is actually a 7.5mBps connection.
http://help.encoding.com/knowledge-base/article/understanding-bitrates-in-video-files/ says a typical 720p will use 2.5 mbps and a 1080p 5 mbps. this is wrong for many reasons. how many audio channels does it have if it's more than 0 it needs at a minimum 64 kbit/s per horrible lossy audio. then the problem with especially rapidly changing graphics causing encode time spikes where the data is not all capable of being stored at the given bitrate, then there is network routing delays and dropped packets. a buffer will usually smooth that out though.
okay then lets see here, every device that is used for youtube and netflix has to work simultaneously on all devices at the same time. sure a 10 mbit/s stream will let you get 2 streams of data, maybe if they're crappy quality you tubes. 60 mbps and then you can possibly stream 8 streams if they're meant to be shared on the internet. while you can thus say 60mbps is plenty fast for home users, there was a time (holidays) when there were 12 people on the wifi at the same time. and consumer wifi can have 50 connections, so realistically people need 375 mbps, so everyone at a party can stream at the same time. no that was a joke... with 6 antennas it is hard to run 50 connections anyways, even with them all being trancievers.
there were people who swore that dialup was enough for them, at the time who would have dared dream of being able to drop $120 for a 128 GigaByte chip the size of a fingernail http://www.amazon.com/SanDisk-Ultra-MicroSDXC-Memory-Adapter/dp/B00IIJ6W4S so saying gigabit networking has no use for home users (though there clearly are for businesses, someone made netflix you know) is to be shortsighted.