I didn't watch the Last because well.. I hate Naruto Movies but there are 2 Groups of people saying something different on the outcome with Hinata's meeting with Hamura.
Group 1- After talking to Hamura she required his Chakra in order to destroy the Tenseigan Altar
Group 2- After talking to Hamura Hinata finds out that she always possesed Hamura's Chakra, since she is Main Hyuuga.
The reason why I ask is because if Option 2 is true than Hinata's so called "power up" isn't a power up since she possesed the chakra from the start. But either way Option 1 seems more logical because I can't see someone losing to other Hyuuga if the person is in possesion of Chakra this powerful, but then again like Ashura's Chakra her Hamura Chakra may just had too bloom or something?
I'm going with 2-
With Naruto/Sasuke Hagoromo does this whole "Put out your dominate arm" and you see them place their palms on his for the transfer.
Manga
You must be registered for see links
Anime at 2:20
You must be registered for see links
With Hinata-
at 42:54
Random main branch Otsutsuki clan member corpse says "The Byakugan. I sense the Byakugan" and proceeds to spit out an orb that flashes and causes Hinata to pass out.
You must be registered for see links
at 01:00:45
Later we learn that she was shown a vision of Tenseigan and Hamura comes and tells her not to let the world his brother created be destroyed...Vision end.
Problem is that as far I remember Hinata didn't use her chakra visibly in the movie before this...so we can't tell if the color went through a change or Sp were just being accurate to canon since her chakra was already supposed to be purple.
For her move...we don't know if that is just a skill she developed over the 2 year time-skip.
And for a person who received a power boost from Hagoromo's brother...she didn't really show vast improvement.