Windows & Linux
"it seems far more likely that Microsoft will drop the price of Windows XP and extend its support to maintain share."
I think ultimately, MS will end up giving Windows away for nearly nothing, just to maintain their lead in installed PCs. I've been saying for years that the MS Tax will end up becoming a MS rent. Free MS OS but with very limited functionality. You pay for features.. That way, even if you don't upgrade to their latest flavour of bloatware, you still pay your $5 per month for the OS, $5 for Office etc... The "Vista Ready" mess has taught them they cant drive hardware sales just by releasing a new OS with ridiculously heave hardware requirements.