I had installed the Tech Preview yesterday. And guess what, it's feeling and looking the same as the Windows 8.1!
What's so new in Windows 10 that it should not be considered as an update to Windows 8.1?
The so called NEW Start Menu is just a collaboration of the old Start Menu and the Start Screen. And the Task View just looks like a mere upgrade from the Flip 3D.
When a new version of any OS is out, it is expected to overhaul it's preceder largely (in terms of UI and functionality), isn't it?
We have experienced this during the upgradation process of Windows XP --> Windows Vista --> Windows 7 --> Windows 8/8.1/10
Did you notice 8/8.1/10? I'm sure you'll understand what it means
My genuine expectations from Windows 10
were:-
1.) A new boot animation.
2.) Icons (completely) changed.
3.) New logon screen.
4.) Segoe UI Font slightly changed.
5.) Windows 10 branding somewhere (at least cornered) at boot.
6.) The traditional UI of the Start Screen changed a little.
7.) Change in "This PC" explorer layout, etc., etc.