"The most notable feature in the new version is an improved Windows Search which, in shades of search engines of old, spends a while indexing every folder and file on the PC in what Microsoft claims is a “one-off” process."
Can the user specify to not have their search terms sent to Bing as well?
When I used Windows, I used Everything for search. It's a high bar to reach, and even if MS reaches it, they'd just be reinventing the wheel.