New build and just about the same.. I still like it so far.

I'll bet there will be third party themes that will be out soon after the OS comes out.

I think you can still install a version of the old Win7 calculator on Win10 and it works fine.

For me I like simple clean things and Win10 just works for me. Not that I don't like Win8.1 but I just dig Win10 after using it for some time now.

Jeff