In addition to its innovative design, the XPS 18 hits the much sought after sweet spot between mobile entertainment and desktop-level productivity, and dramatically redefines beliefs of what a PC can do.

ENGADGET: Dell's hybrid XPS 18 is a $900 all-in-one PC and an 18-inch tablet

Where Bert Danner falters in his analysis is in assuming that the mobile platform battle will play out like desktop computing, where network effects yielded near monopoly-level dominance to Microsoft.

FORBES: Who Wins, iOS or Android? Both, But Pity Everyone Else.

Even apps are tracking that way: Tweetie, one of the most popular Twitter apps, debuted for the iPhone before it was available for Mac OS. Now we need to bring some OS-level innovations back to the PC desktop and take personal computing to the next level as well.

ENGADGET: Entelligence: Stains on the sleeve of my operating system

Lenovo also introduced an extreme performance gaming desktop PC, the Lenovo Erazer X700, designed for enthusiast-level gaming and graphics-hungry applications.

ENGADGET: Lenovo introduces Erazer X700 gaming desktop: dual graphics support for $1,499 and up

At the entry level, you get a 3GHz Core i5-3550S processor, a desktop-grade chip in the Ivy Bridge family.

ENGADGET: Vizio All-in-One review (24-inch): a TV maker tries its hand at desktops