Virtualization is going to become a must have for servers, as it will allow companies to buy one machine for development, test, QA and training environments instead of buying multiple machines. We're talking significant, seriously compelling cost savings here in the corporate world.
AMT (Active Management Technology) is also likely to catch on as a compelling feature. I doubt there's a large corporation out there that doesn't want better, easier and cheaper control over it's PC infrastructure.
Of course neither of these means jack in the home environment, unless you want to use one PC to allow dad to do the online banking while junior plays games on it at the same time. Because most everything's been single core up to now (making such a usage model pretty much impossible), the hardware isn't there yet to let multiple family members, in separate rooms, all utilize a common machine. But when that capability is there (and I see it as inevitable that it will be developed), virtualization will again be a compelling feature (i.e. junior can crash his game and reboot his virtual machine, but dad's online banking session will go right on).