I'm no so sure.
With HEVC and other more efficient compression tools becoming more popular, and as technology advances further allowing even better compression, I don't think bandwidth demands will be as big as some people think.
I also don't think the move from HD to 4K will be as ground breaking as the quality increase from SD to HD was. I'm not saying 4K will be a gimmick like 3D, far from it, but it'll be a long time before it's mainstream.
The jump from 8meg to 40meg was huge and allows so much more to be done by multiple users, however I don't think the same "gain" in user experience will be seen when going from 40mbps to 200mbps.