That is really interesting!
Agreed that agent harnesses as the primary interface is also a big possibility. From our conversations though, a lot of companies also don't want to lose complete control over the user experience. Which is why I think an increasingly more likley direction is every company having their own agent that functions as a "personal concierge" that gets stuff done for their usrs user and gives them what they want, but all under their own control.
I think it is a really interesting space in general, and looking forward to continue building in it!