Hmm this is an interesting one. I used photo edit program to take a closer look (pics are a bit small). The pixelation does change some but you can still get a decent view when you change the contrast slightly. It does seem to be in front of the tv. I say this because a portion of it is also on the edge that frames the screen. Can't rule out the reflective surfaces right by the tv that Damien mentioned just yet, but I'm not sure how you would get the refelction of equal brightness on two different surfaces like that? The frame edge does not have the same reflective quality as the screen, if it did you should see some of the other images reflecting in the screen reflecting within this framed portion. With a flash not being used I'm also not sure how you would get such a bright reflection, unless lighting in the area was at a perfect angle to do so? But that still doesn't explain the two different surfaces. With those questions in mind I'm not certain what this may be, and am yet convinced it is just refelction.
I look forward to hearing other opinions and perhaps someone will provide some insight from the photography perspective on the questions posed. =)