You will be forbidden by DRM from running linux on it. Their policy is clear on only permitting Microsoft signed OS to boot and forbidding the device manufacturer from permitting you to run an OS not crytographically blessed by Microsoft.
That is talking about Windows mobile. Windows mobile != Windows 10 on ARM. While it may apply to w10 on arm, we don't know yet as none of that documentation has been released. The reason it was a hard requirement on mobile is thanks to the carriers. That being said, please don't spread fud, it helps no one. If you have an actual WoA document we can complain up ms about, great. But this is not that.
I would love something as light as the Galaxy Tab S2 (Less then 400g!!) that I can use with Linux and a type cover.
I would be able to work everywhere I go. Because carrying around 400g with me all the time would be worth it.