twinui-CanSuppressStartScreen is related to a "kiosk mode" and I didn't find any other feature that it controls, at least in this early build. You'll have to set twinui-CanSuppressStartScreen to 1 in the ProductPolicies key (via ProductPolicyEditor from wsservice_crack) and create a DWORD key "KioskMode" in HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartMenu with value 1. Any user without admin rights then gets a blank screen instead of the start screen (it does not switch to desktop automatically, you can start any desktop or store app with the search charm though). The device encryption strings are part of Bitlocker Drive Encryption, but I don't know if there are any new features introduced. The "IA" prefix probably stands for "inherited activation" and could mean VMs activate automatically provided that the host machine is activated. This is just an educated guess of mine and could be wrong.
@ misaki 2010 Yeah Thanks for correction. This Would make some users happy: hxxp://news.softpedia.com/news/Almost-Confirmed-Windows-8-1-to-Let-Users-Skip-the-Start-Screen-345829.shtml P.S.: Replace xx With tt