Valve cofounder and software engineer Gabe Newell, who is attempting to create a new era of open-source gaming with the Steam Box project, sees the proliferation of the Apple TV as more of a threat than console giants Sony and Microsoft.

From Apple Insider:

In a talk at the University of Texas covered by Polygon, Newell said Apple's growing presence in the living room has become a danger to the Steam Box, Valve's upcoming Linux-based gaming platform that will offer user-generated content at affordable prices.

The Apple TV remains somewhat of a dark horse in comparison to Sony's PlayStation and Microsoft's Xbox, but Newell said the market is about to change, trending toward cheaper hardware that can integrate with a user's PC.

 Valve's Gabe Newell says Apple is biggest threat in future of living room gaming