There is a point, even with bandwidth, where you get reducing benefits to scale. just because we've had an insatiable appetite for faster and faster speeds doesn't mean that will always be the case. honestly is there much you wouldn't be able to do with a symmetrical 1gbps link? eventually we will stop worrying about faster speeds probably once we get to 1/1gbps or maybe 10/10gbps even with all the applications we can dream up it will happen.