In this chapter we learn Sasuke has been going to Kaguya's dimension to find out information and due to this he knows were to go to save Sakura.
Before this chapter it seemed unnecessary for Sasuke to be gone for so long and miss out on Sarada's childhood but now we know he's been travelling to different dimensions probably for many years.
We've seen there are many different dimensions in the Kaguya fight so maybe it took Sasuke a long time to locate the enemy's hideout in the dimension.
I'm sure the dimension warping ability will also be useful in the future like if they need to escape from the new villain or if the villain puts them in another dimension.
It could be that this new technique will end up like Kirin and not be used again.
I also made a thread about explaining his rinnegan teleport:
Before this chapter it seemed unnecessary for Sasuke to be gone for so long and miss out on Sarada's childhood but now we know he's been travelling to different dimensions probably for many years.
We've seen there are many different dimensions in the Kaguya fight so maybe it took Sasuke a long time to locate the enemy's hideout in the dimension.
I'm sure the dimension warping ability will also be useful in the future like if they need to escape from the new villain or if the villain puts them in another dimension.
It could be that this new technique will end up like Kirin and not be used again.
I also made a thread about explaining his rinnegan teleport:
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I bet you think Karin was the virgin Mary don't you.