Board Thread:Theories and Speculation/@comment-45345143-20200330202500/@comment-4961229-20200403035711

LegionZero wrote: Kakshi didnt transform. Boruto doesnt have access to Momo's abilities. So far Momo's abilities only manifest when he is in control.

The diamond symbol is called Karma. It does a buncha stuff. It absorbs and expels chakra. A person with Karma is a potential vessal for an Otsutsuki. It hasnt been totally explained but as of now the implocation is that the Otsutsuki is sealed in the karma Kakashi's eyeballs certainly transformed into legit Sharingans. What else would need to transform to use Obito's abilities?

Boruto does have access to abilities a helluva lot like Momoshiki's. That's what Karma is. That's how he can absorb jutsu, use space–time ninjutsu, increase his strength and speed. He doesn't know how to use anything else. He can't even activate his own doujutsu, let alone use everything that Karma allows.

But I agree that it's also similar to a jinchuuriki in the way it's implemented. Perhaps, it's more similar than Obito/Kakashi and Dan/Tsunade. It could also be that the only difference is the fact that it's a hostile takeover rather than a friendly lone.