Valve have shared a new video that demonstrates the Steam Controller the company released announced for use with—or without—their upcoming Steam Machines.

Xi3’s modular PC, the Piston—which some may remember as the original “Steam Box” announcement—will be available on November 29th.

This morning, Valve finally made their long-awaited Steam box announcement, although details at this point in time are sketchy at best. Here’s what we do know, though.

“We were asked to build a product specifically for Valve,” says Xi3 founder and CEO, Jason A. Sullivan.

Xi3 Chief Marketing Officer, David Politis, explains how Piston hardware upgrades will be possible and the possibility of third-party upgrades for the device.

But you’ll be able to install Linux or Android to the device if you want, and run any X86-based application on it, says Xi3′s Chief Marketing Officer, David Politis.

Xi3′s “Piston” modular PC will come in three configurations, starting at $1,000.

“This is not some locked box by any stretch of the imagination,” Valve boss, Gabe Newell, says about Valve’s own in-the-works Steambox.

What’s the Xi3 Computer Game System? The easiest way to describe it is to call it the “Steambox” that everyone has been expecting for some time now.