Valid question. Some of the explanations I've seen for that sound reasonable, though. It's a "super high-def" TV, so it's like 4x or 16x the resolution of an HDTV, something like that. Possibly so much so that your brain just assumes that the static landscape is indeed real (the whole point of the commercial), given the circumstances. That is, you're in a job interview, possibly nervous, and don't really take a critical look at it. You glance, think "window" and focus on the interview.
Then, when it starts moving, you look up and what you're seeing again overrides being critical. It's high enough def to fool your brain.