There really is new stuff in Windows 8
When you first install, you’re going to hate it. Couple weeks and later and its kind of nice. After a month you’ll hate having to use W7.
The UX team did an insane amount of research and found that when launching programs; our eyes only focus on the bottom left corner of the screen. or the top 4 suggestions above it. This is why the start bar is dead and tile mode (formly metro) came to be. Now research shows that our eyes focus on the entire screen and can consume more data quicker.
As the next version of all major applications comes out, those tiles will be come smarter and smarter due to search being a first class citizen in w8. Now the model is becoming data centric so you should just hit WindowKey then type “resume” and all the relevant objects should appear. This versus the other model of click start, find word in the list, click file open, figure out which folder you put the file in.
For the more admin/geeks there is now PowerShellv3 which is an amazing/consist scripting language. Anything that you can do from clicking around is also exposed through PowerShell. Along with being able to fully control applications it also has support for manipulating COM or .NET objects. Another cool feature is PS-Remoting which allows you to run all or parts of your script on a second machine just as easily as running local.
You can use LiveID (previously Passport) and OpenAuth to create the same login on all your devices. This enables scenarios such as securely sync your “my documents” on all devices you own.
The thing that I hate the most is running it in a Virtual Machine Remote Connect (VMRC) window or other system that prevents easily tapping the Window Key. This isnt too hard to work around, just use mstsc and connect into the VM and run in full screen.