When we install the Windows 8.1 preview, will Microsoft push out the extra new features for 8.1 that we don't have to us through Windows Update.
Nope, not even close to the top 3: 1/ Sinofsky 2/ Eric Schmidt 3/ canouna(aka NTmartha). ..... tim cook slightly behind AFAIK.
Tim Cook is definitely not Ballmer's list,because even he knows that will result in a full blown religious war just as the console wars are flaring up again XD
Note that if you install the Windows 8.1 Public Preview over your current Windows 8 installation, you will have to reinstall all Windows Store and desktop apps when the the final version is released, so you might not wish to test the new OS on your primary PC. All user data and accounts should be retained.
The ISO download of Windows 8.1 Preview will be the best solution for users not wanting to use any of the 13 languages it runs in (that’s limited beyond the standard and final build) as well as those working with Windows 8 Enterprise