It has arrived! A beautiful piece of kit, especially compared to the S4. It'll take me a bit to get it up and running and properly configured, but I will post my observations when I have a good feel for it.
I didn't like Blinkfeed either. I considered the BB10 Hub and Peek more interesting and productive. I'm just curious to see how it evolved on the actual HTC One M8. The one available on Google Play isn't all that exciting either.
Well, after working with it off and on for a few hours, setting it up, adding my email accounts, etc., my initial impressions are very good, if not outstanding, compared to the S4. I need to get used to Sense vs. TouchWiz, but I'm already liking Sense a bit better. Overall, it's performance is much better than the S4 - apps open faster, screen motions and transitions are much smoother, just a much smoother experience. Still need to play with the camera and other options, but I think this One's (ha, see what I did there?) a keeper!