The Xbox One's HDMI pass-through port will support "any HDMI device", including the PlayStation 4, Microsoft confirmed during its presentation at the Tokyo Game Show.
During the presentation, Xbox senior director of product management and planning Albert Panello received a question regarding the Xbox One's ability to support video feed from the PlayStation 4, which he did not respond to directly.
Later in the presentation, when Panello discussed the Xbox One's ability to snap applications to the side of the screen during gameplay, he said "any application can be snapped to a game…this could be the live TV feed, so if you wanted to be playing Ryse and Killzone at the same time, you could snap that."
Killzone is a first-person shooter series exclusive to Sony consoles. The newest entry to the series, Killzone: Shadow Fall, is an upcoming PlayStation 4-exclusive title.
The confirmation from Microsoft that the Xbox One will not block the PlayStation 4's video signal comes shortly after Sony revealed that it will not prevent users from capturing video from the PlayStation 4's HDMI port.
The Xbox One is scheduled for launch in North America, most European markets, Australia, and New Zealand on November 22 this year, with follow-up releases in Japan and the remaining European markets in 2014.