MagnuM Thank you! Visual Snow describes it very well. Yep, I do see it everywhere, but it's most pronounced on computer screen, and then some screens more than others. I think that a glossy screen might make it worse.
The comorbidity with migraine is very interesting --- I did have very bad headaches ovr the past couple of days, preceding me noticing the visual snow. For sure, though, I think it's not new, me seeing this.
I discovered I was "seeing something" when I asked my girfriend if she saw this too, and she was like, "wooo! you're crazy."