Have you tried Windows 7? I've been so unhappy with Vista that I've gone back to XP on most of my machines, including my mission critical PC. However, I'm quite intrigued by Windows 7. We will probably see a slim (or lite) version of Windows 7 for UMPCs and netbooks. I'm still running XP on my Samsung Q1 Ultra UMPC and my OQO model 02. Will Windows 7 be the ideal operating system for power PCs and ultra-low-cost machines?
In the healthcare field, XP will probably continue to dominate for a few more years because of the way many EHR/EMR systems are configured. Plus, you're often using older peripherals like scanners, printers, bar code scanning devices, and other devices. Some ambulatory EHRs have an EKG attachment that hooks up via USB. My guess is that most of those older connections will only work on PCs running XP. So, I think that health IT will lag behind other industries and we'll be using XP for a long time.