The way I see it, either this continued indefinitely or the Naruto side wins when Boruto's main characterness proves to be too strong for Salad to keep up. I doubt Kawaki will be the next Sasuke, in the sense of a deuteragonist at least.
Well I'm not exact on it either, but I do believe that Boruto and Kawaki's relationship will take the reign via focus when he does get introduced to the plot.
Whether Sarada can keep up with their Otsutsuki seals is unclear. I feel that the power creep is eventually upon them if Boruto/Kawaki do end up as the 'God tier' of their generation.
It's hard to say because:
Sarada might get a seal
It's hard to just label Sarada as someone who wouldn't be high tier cause Sasuke's daughter.
But Kawaki's role in all of this is very discerning for her role too. Worst case scenario is that she's strong, really strong. But just isn't Boruto/Kawaki strong.
Best case scenario is that she's just as strong as them, or stronger. If she doesn't have a seal, then I'm clarifying Stu there.
Absolutely worst case scenario: She gets placed in the background too long and becomes irrelevant power wise like Sakura. Mitsuki has Sage Mode going for him so he's already capped.
Sarada still needs to upgrade her Sharingan, so I can see how this will conflict with her screen time since not every chapter is a fight.