I just upgraded, it has new stuff. There is a new tab "Secure Boot" where you can turn on Secure Boot for Windows 8.
There is a "Legacy Boot" option below "UEFI Boot" option.
WARNING: DO NOT UNTICK THE LEGACY BOOT OPTION.
I unticked it and left only UEFI Boot ticked, and my PC did not boot, i saw no video on screen and there was 2 beeps followed by a pause and then another 2 beeps. I could get back into BIOS settings it if i hold down the power button for 3 seconds but when i restart again it would beep again. So i connected the IGP and and selected IGP as primary in BIOS, i rebooted again and noticed that there is no skull image on screen, i just saw a Intel Extreme icon all over the screen and Windows did not want to boot, complained about BCD. I then went back to bios and turned on Legacy Boot, tested to boot, it was fine, went back to bios settings, turned off IGP, booted. It was fine.
So be careful.