The fact that it's more mainstream doesn't go to the accuracy of any CNET rumour. They were wrong about 2010 MBP and iPad updates and they're just as "mainstream".
IMO, people are just jumping at a chance to either justify their decision not to buy or worry that they bought too soon.
The comment "mainstream" was clearly about the possibility of moving to shorter release cycles, not the validity of CNET. MBP = 208 days avg refresh, MBA = 336, as things currently stand. A June release date would put the MBA approx. 220-250 days since last refresh. Not implausible by any stretch.
And to your point many people jump in these discussions to say "no way", as a way to justify their purchase as a smart decision.
Man I hope this happens soon so people hate their c2d airs so much they sell it to me for cheap.
The CPU difference should outweigh the GPU difference for most people.
Flame away.
Yes & No.
Whilst greater CPU processing is welcome, GPU performance is not just limited to gaming.
GPU accelerates iLife, OSX elements, Photoshop etc.
Also whilst we have discrete graphics we are not sharing any onboard memory, unlike integrated graphics.
A 2GB sandybridge chipset will be losing up-to 256mb of memory as it allocates it to the GPU giving you effectively 1.75gb for system as opposed to 2GB in current machines.
Not a major difference, but undoubtably one that will affect base performance even if its only slight. (not a big deal if your upping to 4GB).
As others have said greatest benefit will be battery life.
Currently just writing or browsing the web I get 5-6 hours on my MBA. I imagine a Sandy bridge would get 10% more battery life therefore 6-7 hours.
Also whilst we have discrete graphics we are not sharing any onboard memory, unlike integrated graphics.
A 2GB sandybridge chipset will be losing up-to 256mb of memory as it allocates it to the GPU giving you effectively 1.75gb for system as opposed to 2GB in current machines.
The current models have integrated graphics, not a discrete card. We just get a nicer one (NVIDIA 320m). So we still have 1.75GB or 3.75GB of RAM for our applications.
Man I hope this happens soon so people hate their c2d airs so much they sell it to me for cheap.
Oh yes didn't realise that it too shared system memory.