(Hall didn't make any claims about Windows 10 compatibility for the Surface Pro and Pro 2 devices, but I am hearing from my sources that both those models should also support Windows 10. I'm less sure about the ARM-based versions. All Microsoft will say re: Windows 10 compatibility for Surface RT and Surface 2 is: "Windows on ARM-based processors continues to be an important element of our strategy for phones and tablets, and we’ll have more to share on the Windows experience for mobile devices at a later date," in the words of a company spokesperson.)
Microsoft introduced today a limited-time Surface Laptop Replacement Bundle. Via that bundle, which Microsoft is making available through its authorized Surface resellers, users can get up to $150 off a bundle of a Surface Pro 3, Type Cover and Docking Station when purchased together.
The deal is availale in the U.S. immediately and coming to the "majority of markets where Surface is available worldwide in the coming weeks." It's a "while supplies last" offer.
I haven't heard from my contacts that either of these things are happening. In fact, I've heard from one of my trusted sources that Microsoft's Surface strategy, going forward, will be to focus on Intel and to cease production of any future ARM-based Surfaces. But that's only from one source, I'd note.