1. User Interface:
Windows 10 has start button like windows 7 combined with live tiles, there is no force Full screen start button.
2. Work Simultaneously:
Multitasking is made easier than before compare to Windows 8.
Windows 10 have capacity to screen maximum 4 Apps, makes swapping between multiple(4) apps easy and time saving.
3. Be a Software tester:
Microsoft offer to become software tester sitting at home, over 1 million user already registered to give a little hand in development of windows 10 by using Windows Feedback app to report issues/bugs to Microsoft.
4. Better than windows 8:
Microsoft trying out to let know what the users want in latest build(of Windows), by collecting suggestions and improving its features that has been never before happened.
We can expect better Windows from Microsoft as They working on what we want to be in features of Windows 10.