Most of the people I know will see the image on the main page and think it is some type of specialized search engine, and not come back.
I'm all for market competition and I realize that MS feels as though they HAVE to do this, but this seems a lot like MS's failed attempt at revamping their search a few years ago. And back then they had the advantage of having an operating system that people didn't despise. Without a good tie in (unfair advantage) with an OS and what appears to be an attempt to get people to shift the way they search I think this is doomed.
I firmly believe it's a case of tech echo chamber at work.
I will add that when I gave instructions on disabling UAC it did result in "oh, that's good" type of comments. But I did that proactively. Never had them come to me seeking relief from it. Kinda like when a loud furnace shuts off in the winter and it's so much more pleasantly quiet, but you didn't even notice it when it was on.