I agree with you on medical advancements, but I am skeptical about curing cancer (which is really curing hundreds of different diseases) any time soon. Alzheimer's might be nearer and a cure could come from a big breakthrough, but that's still in "I'll believe it when I see it" territory.
Senescence... oof, I think we're a good century or so from figuring that out, at best. And even if you're right, I expect this to be a closely-guarded medical technology, with near-immortality only available to the super-wealthy.
Fusion power has been constantly "on the horizon" since before I was born, and I'm not convinced it's any closer just yet.
Space travel is... mixed. It's amazing that the costs to getting things into space have been going down, and amazing that we have things like the JWST and so many different organizations and countries sending stuff up, but it's depressing that one single company (run by a megalomaniac) is so far ahead and owns all the technology to bring those costs down. The commercialization of space is not something I'm looking forward to, and I expect governments to do their typically shitty stuff when it comes to space.
Ugh, writing this all out made me sad.