The interesting bit is:
"Naturally the extra quality might give a headache to some providers and that’s one reason why Netflix are attempting to encourage ISPs to adopt Netflix Open Connect, which is their “highly optimized video content delivery network” that’s available at no cost to broadband providers."
I doubt any ISP's would struggle in their core of distribution layers of their network with this upgrade. The only problems will arise if there are access network capacity issues that beat forecasts in certain areas, otherwise this is a bit of a non-story really.
I hope Now TV move to match this quality. Their standalone NowTV box (for people who don't want Sky or prefer a pay as you go model) is awesome for the price but let down by being only 720p.