Board Thread:Theories and Speculation/@comment-30598131-20161125182230/@comment-2006510-20161125233252

^Or Boruto could get Hamura's chakra, seeing as Hinata has it - Hamura is an Otsutsuki as well, so the only source isn't Toneri. Plus Boruto is descended from the Hyuga Clan as is Himawari, so it could probably be done for either of them, or even Hinata had she wished

As for the Tenseigan, it personally strikes me like the Mangekyo Sharingan; it's an advanced variant, seeing as it literally takes having Byakugan eyes to form it. Difference being it seems to take combining two powerful chakras to manifest it, rather than pain of loss