Of course, Metro UI won't be enabled by default in Enterprise and Server versions.
Special build of Windows 9 Enterprise Technical Preview is compiled already, OEM test builds of Windows 9 Pro won't be available for public.
Test build of Windows 9 RT for ARM processors is compiled too, but it can be tested only on Surface 3.
MS: "We don't know how to make people switch from Windows XP. Users of Windows 7 will get awesome offer.
Those who bought Windows 8 Retail versions or bought a machine with it, will receive special offer, worth about 20$.
Windows 9 will support 3D on UHD TV.
New feature: backup and restore system image from cloud.
Microsoft is developing ability to virtualize backups of physical systems in the cloud.
"Cloud hypervisor" - it's a reality.