The Sony VAIO Tap 21 (SVT21217CXB) is a vast improvement over last year's pioneering portable all-in-one desktop. It has a lot more going for it, but there's still not quite enough to call it our top-pick for this nascent category.
The Lenovo ThinkCentre E93z is a 21.5-inch all-in-one desktop PC that comes loaded with 4GB of RAM and an Intel Core i7 CPU. It has a 1080p full HD touch screen display mounted on an ultra flex arm for maximum adjustment.
The IdeaCentre Flex 20 is another innovative desktop PC/tablet hybrid from Lenovo. It looks just like a standard all-in-one desktop PC, but fold up the stand and unplug the power cord, and you've got a 20-inch tablet.
The Dell XPS 8700 Special Edition tries to provide you with lots of performance power, some added connectivity features, but it doesn't leave much room for future expansion or a second graphics card. It delivers in the performance category, but it's pricier than most other desktops.
The HP Envy 700-030qe is a member of the class of systems that used to be called high-end multimedia desktop PCs. The fact that you can get all that power for over a $1,000 less than you used to is amazing.