Looks excellent. Those juvenile comments above from those first-time posters notwithstanding (just people or one person with an agenda), for me this looks like the first major OS improvement in many years. I think this is transformative and will save millions of people real time. Plus, as we become more accustomed to using it and more efficient with it, those time savings will only grow. Anything that can help us, well, recall things that we vaguely remember is a masterstroke idea to bring to computers. I frequently spend many minutes, sometimes over an hour, trying to find something I knew had I been doing just in the past week or two. Sometimes I eventually find it (usually turns out I was looking for an email or a web page when it was actually in OneNote or a Teams chat or some other similar app-mix-up). Sometimes, I never find it and give up.
This could save me hours every month.
One question: everything in the example was based on screen shots. Is that the ONLY function, or can this integrate with search to look for text inside files too? For me, the biggest benefit would be if it were possible to just have a single universal search across everything including screen shot history and documents based on the same timeline (e.g., using the Last Modified Date or Picture Taken Date on the file). My guess is, due to the security complaints from the prior alpha version, they're not willing to integrate this with anything else, but I hope they add that when the security furor dies down.
My only other very, very minor concern: I understand why they require Hello for the added security initially (given that same prior press), and I'd want that on my laptop where I would worry about someone else getting their hands on it, but for my desk computer, if the computer is unlocked, that means I already recently used Hello to unlock it and am still sitting at it. I hope they'll eventually drop that requirement to avoid the momentary hassle. (My Logitech BRIO Hello camera requires me to lean forward and stare into the camera for it to unlock, which is relatively quick, but not as quick as not having to do it.)