The AI-powered search features seem really promising, as finding the right design file is a problem I face every day. What they showed was the ability to paste a screenshot (e.g. from production) and have it find where that design came from, or use a text search to do the same. That's something that'll make me squeal with joy if it actually works.
Filling in mock data in designs is also a big potential quality of life improvement. The domain I work in is so specific that I'm not sure it'll be of practical use to me, but I'm hopeful.
All in all, I'm glad about the parts where they are trying to target some specific pain points with AI, skeptical about the rest.