Crap intel graphics support means XP will be around for a while.
Have been using the Windows 7 RC1 for a week or so now.
Its biggest downfall and the reason Windows XP will be around for several years to come is Intel Graphics Support, or should I say lack of it.
The Intel 'Centrino' Chipset was one of Intel biggest sellers for Laptops - that is the 82855 Chipset, which was followed more recently by the 915 Chipset.
Both these were developed before Microsoft issued the minimum standards for the Aero interface - neither of these chipset meet them. This meant that Aero was never supported by these chipsets on Vista and the reason to quite a lot of dissatisfaction with Vista - driver issues.
In 2008, 14 million Netbooks were sold using the 915 Chipset - and these aren't going to be supported by Windows 7, even though frustratingly it will run perfectly well on both Centrino and 915 Machines, other than the graphics. With Vista it didn't matter it was such a resource hog - there wasn't worth bothering trying - so you just stuck to Windows XP. But with Windows 7 is runs well (except the graphics), or should I say intel graphics.
When you install on a 82855 Chipset at the moment - it says no driver found - and defaults to standard VGA fixed at 800x600.
So any laptop with a centrino chipset 82855 or a 915 Chipset gets a better experience with Windows XP, that is DVD's work with hardware acceleration, iplayer/flash player runs smoothly.
Under Window 7 is appears as though your making an Aardman animation.
The scenario is this
You have a older Centrino Chipset Laptop. Your thinking of purchasing a new laptop (you've heard good things of Windows 7 and are thinking of giving your old Centrino Laptop to your kids. They want the latest and greatest. You decided to try out Windows 7 RC1 on your Centrino. You find driver issues ie. no graphis support - you decide Windows 7 is a heap of shit - and continue using XP. The new laptop (if you still buy one) you purchase it with Windows XP Downgraded or you just stick with your Centrino running XP.
Instead if there was a basic driver (ie no Aero, but graphics as good as XP), your find Windows 7 works happily on this old bit of kit, pretty fast - no issues, but iplayer in HD doesn't run smoothly as it might- you give this laptop to your kids. You buy a new one for yourself and are happy to have Windows 7 because you have had a good experience running on your older laptop, it was slightly slow hardware letting down Windows 7 rather than an issue with Windows 7. Intel don't get the blame / Microsoft don't get the blame.
Intel need to get their act together and get some basic support otherwise Windows XP is going to around for a hell of a lot longer. And many companies just won't make the jump.
And Microsoft... either allow a transistional hybrid driver that doesn't meet the specs - just to make sure Windows 7 is the experience it should be.
Its all the more frustrating because 5 years ago I was searching around to install Linux drivers to get dual display. Today Ubuntu - it just installs and I actually have an Aero type interface which works on the Centrino Chipset, not superfast but well enough. How the tables have turned regarding the effort required to get Windows 7 working compared to the new Version of Ubuntu 9.04.