Not true. Apple could easily go with an AMD CPU, and use an AMD (no longer ATI) chipset/GPU combo. This would be sorta the "norm" in a sense as Apple really liked the Nvidia chipset/GPU combo. If AMD can provide the best overall solution, I hope Apple goes with it.
The problem with Intel, is it markets to consumers that the only way to improve computers is to upgrade CPUs. In reality, the C2D CPUs are amazingly capable. What we need is for Apple to focus on all of the other things that with tuning could be impressive.
For example, go beyond SATA-II as SSDs are quickly going to saturate the bandwidth of SATA-II drive controllers. The bottleneck in the current computing environment is the drive and drive controller combination. The reason the MBA with an SSD is so very fast is Apple jumped on the SSD bandwagon... and thankfully it didn't take them as long as it has with other tools and components - like no Blu Ray and etc.
Take advantage of better graphics systems. Focus on making simple use of OpenCL and other tools available to application providers. Make Grand Central Dispatch a widely used tool. Keep focusing on software improvements. ADD MORE ***** RAM!
About the least problematic (and most capable) component in the MBA, or any Mac for that matter, is the Intel CPU. But until consumers understand that, Apple will be forced to upgrade the damn things. Just like when it upgraded the 15" to Core i-Series CPUs... the users would have been better off with C2D and Nvidia 320m, as they would have had the much more powerful base graphics system. Everytime the 330GT kicks in it eats more battery than it would have had the 320m had first crack at taking care of the graphics.
I would say people need to learn about the current state of computing and understand what the hell does what... before preaching go big, GO INTEL, or go home.
This is probably the best post you've made.
Everything you say is spot on.
I know everyone is complaining about the lack of an update, but any of the rev B or C MBAs (i.e. updated graphics abilities) with an SSD are pretty good machines, even today. For example, my rev B boots faster than the new core i5. Why? Because the SSD>>spinning HD. The best thing to do is for people to buy a balanced system because then it means no one component is dragging the whole thing down.
As a side note, because everything you say is spot on, my last computer purchase was ......... a PC. For 1/4th the cost of an appropriately configured iMac, I was able to get a well-balanced PC. Windows 7 has grown on me, and while the MBA will be my laptop for the foreseeable future, the PC is slowly supplanting my iMac as my desktop. Google is spot on in saying that the majority of time we use are computers to be on the internet. You don't need OS X to do that.