How would most people notice? For them to notice it requires them to actually utilize the gpu beyond it's capabilities. *Most* people won't be hooking a graphically intensive game up on the MBA and even fewer *most* people will be using the MBA for rendering 3d animations.
I think your rant about the Intel IGP is unjustified, you might be disappointed if you were one of those who used the MBA for gaming and/or other graphical intensive tasks, but seeing as everything else will speed up because of this upgrade I consider it a very good thing indeed.
Also, not all games are GPU dependant even, Warcraft 3, GTA IV (which probably will be overkill for the MBA even with SNB), and I believe someone even said Starcraft II, and by far not much software at all utilizes the GPU beyond what the HD3000 should be capable of handling.
First, go re-read my post. Second, look at how you are misquoting my "MOST" comment.
I said the loss of the Nvidia GPU would be far more detrimental to MORE users than they would believe.
I said it will come as a shock to MOST people that the Intel HD 3000 in low and ultra low voltage variants is much worse than the Nvidia GPU and that the low and ultra low voltage SB Intel HD 3000 is underclocked and will not perform nearly as well as the HD 3000 in the 13" MBP. Everyone always wants to use the 13" MBP in their argument, but they're missing the point that the low voltage has an underclocked IGP while the ultra low voltage has an even bigger loss in performance.
That is a big difference from what you implied my words meant. I know that "most" users don't use their GPUs all the time, but we should also expect better MBAs all-around. With Intel HD 3000 SB we will be taking a step backwards to at least October 2008, and maybe worse. That does affect far more users than you would care to admit.
Next, this isn't just about games. Remember the original MBA released in early 2008 with the Intel IGP? Pile of crap compared to the Nvidia-based MBAs. Even though CoolBook and faster SSDs help it, it's still the worst Mac released since the Intel transition - worst by a large margin.
I love Apple products and the MBA especially as I have purchased every MBA to date. I hated the original, gave the Late 2008 another shot and fell in love. The major faults of the original were summed up into Intel's IGP paired with an overheated CPU. Intel couldn't compete so it didn't play fair and honor its licensing agreement with Nvidia, and we ALL lose as a result - not MOST of us, ALL of us lose. We could be using Arrandale CPUs and Nvidia 320m GPUs in our 2010 MBAs had fair competition won as it was supposed to. We ALL could be looking forward to amazing Sandy Bridge CPU performance and next generation GPU performance had the right outcome happened. Apple tried too, so the real failure was consumers not understanding and demanding competition instead of accepting anti-competitive Intel to force out real innovation so it could sell more chipsets to Apple.