We have started hearing some details about Microsoft's mysterious project called Andromeda, which was first rumoured to be a foldable tablet. The device that could be a part of new Surface lineup and could be advertised as a foldable digital notebook.
At this point, not much is known about the Andromeda, but the device puts pen and inking at the very forefront of its experience. Sources are also saying that it is unclear if Andromeda will ever see the light of day, but if it does, 2018 will be the earliest that it will be announced
"I'm told the device puts pen and inking at the very forefront of its experience, with some prototypes opening up into a notebook app that's tied to OneNote with support for your usual inking options via Windows Ink. The notebook app itself is designed in a way that mimics writing in a real notebook, with virtual pages that spread across the foldable device."