We will just have to wait and see the reviews on this GPUs next year when it will be released. For now, it's just Nvidia showing off.
6xx series have a good power consumption draw? Yeahh, of course, when they chopped off much of the GPUGPU power.
Then, AMD will show off about the 8xxx series.
Just wait for the reviews.
Although performance is sweet, for someone who cant buy new GPUs every year, this annual system of launching GPUs really sucks
Unfortunately, thats the way things work. If your video card runs your favorite games, then it's fine, upgrade at 3-4 years.