So that was a very long way to write "Yea, AMD has choosen to ignore 90% of the market".
And your subjetive views on "value" dosn't ring a bell with me...or the majority of consumers.
That is not "intelligent"...that is niche catering...and very unwise buisness wise.
Yeah, no. It's not AMD's fault that the vast majority of consumers are clueless and therefore buy based on brands.
And value isn't subjective, as much as you want to make out of it. You'll see some people spouting nonsense about how much better NVIDIA is because of things like much better drivers (they're not; most driver issues with both are PEBKAC), PhysX (which some customers like to mention even though when you ask them what it is and what games use it they'll give you a blank stare because 1) they're clueless and 2) only 1-2 game titles a year use it), and CUDA (many seem to think that makes NVIDIA cards automatically faster at gaming than AMD's for some reason). You could make the argument for Eyefinity, but again, it's only a very small niche of people that use it--certainly not average Joe. What most people want, to put it simply, is to play BF3, SW:TOR, WOW, SC2, Skyrim, and some other games. The other "fancy" features are used by very few.
When it comes to value, it boils down to this:
Radeon HD 7750 and HD 6770>GeForce GTS 450. They're faster and consume a lot less power (speaking of power consumption, electricity here is $0.26/kWh and even then most people buy NVIDIA).
Radeon HD 6790>GeForce GTX 550 Ti. Again, faster and consumes less power.
Radeon HD 6850>GeForce GTX 460 1GB 192-bit. Only GTX 460 model that's not EOL. Price is comparable, but it's much slower and consumes a lot more power.
Radeon HD 6870>GeForce GTX 560. Same performance, but the 6870 consumes less power and costs $20 less.
Radeon HD 6950=GeForce GTX 560 Ti. Radeon is a tiny bit faster and $20-30 more expensive, but consumes less power. The 2GB version of the 6950 is good for Eyefinity.
Radeon HD 6970<GeForce GTX 570. Same performance, GTX 570 is $20-30 cheaper and consumes more power. Cheap reference power circuitry should make heavy overclockers weary, though.
Radeon HD 7950 3GB> GeForce GTX 580. HD 7950 is a tiny bit faster, the same price, and consumes a lot less power.
Radeon HD 7970>? No competition for that one for now.
Radeon HD 6990 and GTX 590 I think are irrelevant due to the fact that so few people buy them and the fact they're essentially EOL now. I guess you could say they're the same performance, but the HD 6990 is very loud. At the same time, the GTX 590 consumes more power and isn't as suited as the HD 6990 for multi-monitor gaming (less VRAM makes a difference at huge resolutions like 5760x1200).
So, then, as you can see for your dollar when it comes to gaming performance overall you get more with AMD than NVIDIA, yet you see NVIDIA selling more. Why is that? See here again:
The reason average Joe buys NVIDIA, and I can tell you this from working in retail, is the same reason why they buy Apple: the brand and its "premium" status. There's a few exceptions, but for the most part that's what it boils down to, even if it being premium is false. Most people that came into the store and wanted NVIDIA and NVIDIA only was because "my friend told me he had X problems with ATI 5-years-ago and he told me they sucked" or "I've heard that ATI is lower quality" or "ATI sucks" or "NVIDIA is a more premium brand". Notice how they haven't even caught up to the fact it's been AMD for around 2 years now. And yes, this happened more than 10 times with customers.
If you're smart you'll see the only current NVIDIA cards worth buying for the price are the GTX 560 Ti and the GTX 570 (that one if you don't mind the cheap voltage regulators). But again, the fact that even with that AMD doesn't sell more means the average consumer is clueless and buys, like I said, based on brands and what their misinformed "techy" friends tell them.
Simple: most consumers are bad consumers. They buy based not on what will be the best for their money, but on things like marketing, brands, idiocy, and "what they heard".