Lot of anti nvidia fanboy rage in this thread, but that says more about this forum then the chip.
From what I can see it is a massive step forward in what mobile gpu's support feature wise, and has amazing performance. e.g. I see this benchmark where it's slightly faster then Intel HD 4400 graphics, and multiples faster then any other tablet gpu is missing:
http://blog.gsmarena.com/tegra-k1-gpu-benchmarked-beats-intel-hd-4400
There is no rage, its a mistake to project onto others.
What there is, is doubt, skepticism.
Refer to the article you linked:
"It’s a very impressive statement – now all we need to see is the Nvidia K1 chipset (and its awesome graphics) in action on a real, mass-produced device – a feat the Tegra 4 hardly managed to pull off."
That is exactly what most of us have said. Let's wait and see, if it indeed is uber fast in a smartphone, then there will be glory.