From Gizmodo (liniked):
Microsoft demonstrated a full-version of Office for the ARM-powered Windows RT Surface tablet during the keynote, before calling the device “a great choice for professionals”.
The company wasn’t done with surprises though, unveiling a second Surface tablet — dubbed Surface for Windows 8 Pro — running a third-generation Intel Core i5 (Ivy Bridge) chip for full Windows 8 support. The Intel tablet comes with a stylus that magnetically clips to the side of the device and the tablet itself supports digital ink.
For the Intel-powered surface, Microsoft gave users the same multi-touch keyboard they had on for the ARM-powered Windows RT Surface, before adding another Type Cover which integrates the screen cover with a physical keyboard and touchpad.
Microsoft was cagey with pricing and availability details, saying that the Surface tablet for Windows RT will priced the same as other ARM-powered tablets, while the Surface for Windows 8 Pro tablet will be priced like an ultrabook. The ARM tablet will launch with Windows 8, which is rumoured to be around October, while the Intel tablet will come three months later.
“With Windows 8, we don’t want to leave any scene uncovered…we wanted to give Windows 8 its own companion hardware innovation…something new, something different,” Microsoft CEO Steve Ballmer said before announcing the the Surface tablets.