Apparently, my post went over your heads. History repeats itself, and having the feature set right now is probably not much of a selling point.
Remember, the GTX460/470/480 (all of them) literally crushed the Radeon 5870 in one major DX11 feature; tessellation. However, by the time DX11 became commonplace and useful aside from just a performance boost, the GTX480 was dated and couldn't run relevant dx11 titles very well.
The exact same thing will probably happen with ACE. Yes, AMD currently crushes Nvidia when it comes to this, but how much will that matter when DX12 is commonplace? Right now, most all DX12 games will also ship with a DX11 render making DX12 less than useful outside of a performance boost.
Also, its like some of you are conveniently ignoring that the performance boost mostly just helps AMD catch up to Nvidia's base performance. Yes, there will be a couple of games where that doesn't hold true, but we can't just cherry pick those. Take a look back at mantle, most of the time it merely closed the gap between nvidias base dx11 performance and AMD's lesser base dx11 performance.
Regarding power draw and ACE, are you serious? ACE is implemented in hardware for AMD; as where it will be software for Nvidia. Adding something via software will not all of a sudden wreck nvidias power draw, it will still have to stay within spec.
Before one of you comes in here calling me an nvidia shill, I switch back and forth between the two brands pretty regularly; my recent cards (since dx11) are noted below.
Radeon 5870 -> Geforce 760 -> R9 280X -> Geforce 970 (looks like I'm due to switch sides again)
AMD cards support DX 12 all the way back to the 7970. Nvidia cards "support" DX 12 in that they support a very limited feature set and rely on software emulation for Async Compute. DX 12 will become relevant either this generation or the next. Nvidia is going to have to put significant work into it's cards to support Async Compute. Right now we a starting to see a good trickle of DX 12 titles.
The radeon 7970 does not support the full dx12 feature set, GCN 1.0 cards only support DX12 up to feature level 11_1. For reference, GCN 1.2 (which would be the Fury X) only supports up to 12_0, by contrast the 900 series from nvidia supports 12_1.
AMD has hardware ACE, but that's the only ace in its pocket.