New Xi3 PC is paperback-sized, costs $399

Xi3 raised eyebrows last week when its Modular Computer chassis was named as a host for a potential Steam box development system. Now, the firm is back for an encore. While the company's latest announcement says nothing about Steam, it does introduce a nifty-looking $399 system that's even tinier than the Modular Computer. The Z3RO Pro Computer measures 1.9" x 4.9" x 3.6", or "the size of a small paperback."