High end I don't know, but for low end gaming (where my builds always fall into) I'd never dare to buy anything but intel/nvidia, bangs-for-bucks there simply is no comparison especially if you live in a place where kWh are expensive.

The new architecture may change things, but for now, that's it. They might have started losing market due to shady tactics from the competitors, but the nail in the coffin was the botched bulldozer. that had consequences felt on every series down the road, including unrealistic power consumption per unit.