Windows 10X will also work on laptops, tablets, and foldables

Microsoft recently announced the Windows 10X special edition at a new product launch, which is mainly used on devices with two screens or foldable screens. Although Microsoft has emphasized that this version will not be available for normal devices, the implication is that only these new innovative devices will be available. However, Microsoft observers on Twitter have revealed that Windows 10X has an adaptive user interface at the system level and therefore supports any form of device.

https://twitter.com/h0x0d/status/1182150470342545414

Microsoft is currently developing a new project, code-named “Project Pegasus, ” to introduce a unique Windows 10X operating system for traditional notebooks and different styles of notebooks and tablets.

it's definitely the same shell (Santorini.)

Different shells are when the UI is radically different (like the difference between HoloLens 2, Hub 2X, and W10X)

Oasis, Aruba, and Santorini are the shell names.

Think of Santorini as being an adaptive shell.

— Zac Bowden (@zacbowden) October 10, 2019

With Project Pegasus, Microsoft can recreate the desktop experience with modern code and customize the same Windows 10X experience for traditional form factors.