Rebuttal on video:
1. Horizontal vs. Vertical scrolling of start screen: Personally, I find that I have LESS muscle fatigue in my thumbs with horizontal scrolling.
2. System tray/bar: Personally I don't mind it being there. I do like having the date and time visible all the time.
3. Swiping down to close app/program: Yep, it's still there, it's the same, but damn it, on my SP3 it's hit-n-miss to get it happen. It takes multiple attempts for some reason to 'grab' the application to take it all the way to the bottom of the screen to close it out, or to throw it to the side for split screen. Again, you can only have 2 apps in split screen on the SP3, I missed having 3 apps.
4. Task switcher: Yes, swiping in from the left side of the screen brings up running apps/programs. But in order to select which app/program I want, I have to move my entire hand from the edged of the screen to middle of the screen to choose the program. In W8.1, it's a quick swipe in-and-out with my thumb, then scroll up or down, again with thumb, to select running app. Much less muscle movements in W8.1.
5. Apps list: Good idea, again badly implemented. The icons, and touch target areas are to damn small, even with my SP3 set to 150% display. I'm always hitting the 'power' icon instead of the app list icon, or vise versa. Or doG forbid, hitting the start icon. When I finally get to the actual app list, again, the touch targets are to small, and I'm always starting the app/program either above or below the one I want.
6. Programs in Full screen: Yes, running desktop programs in full screen is a good idea, but again poorly implemented because (one more time) the touch target area's are to small.
Example: Will someone please explain to me why when I'm using file explorer in W8.1 I can tap on the various parts of the program and invoke what I was aiming for (say 'new folder'), but in W10 it usually take me 3 to 5 attempts for me to actually hit what I'm aiming for!?!?!?!? It's like W7 all over again on a touch screen.
7. Search: Ok, I'm going to have to take a step out of tablet mode, and go into desktop mode for this complaint. I REALLY miss the idea of just start typing when on the start screen and it automatically opens the search and enters what I'm typing there. W10, I have to tap on the Cortana icon, then start typing.
8. Edge browser: I've said it before, and I'll say it AGAIN: It needs swipe navigation for forward and back and so forth. Also, they need to take a cue from the phone side and move the address bar to the bottom of the screen. Going back and forth from W8.1 and W10, I'm starting to realize that the app/modern version of IE in W8.1 really has a nice touch interface. With the address bar on the bottom, and all the associated action icons down there work really well. Personally in W8.1 with the IE app, I keep the address bar shown at all times, and it works.
Even when I'm using the keyboard with the IE app, keeping the address bar at the bottom of the screen is nice because I can hit the icons with minimal movement from the keyboard to the bottom of the screen. With Edge I have to lift my entire arm to select anything at the top of the screen.