NASA recently did research on a propulsion system that could get humans to Mars in as little as 3 days for a 100 kg probe, and a Manned (Much heavier) spacecraft in a month.
Now, we do know this tech exists, like Starwisp, but if they can scale up the lasers (And power) needed (With either massive solar panels, or fusion reactors), we could send a probe to Proxima Centauri by the end of the century, and have it get there in as little as 40 years.
Now, there's no telling of whether this would get enough funding (Or any funding), but if it did, we could have a very fast propulsion system that could allow us to explore to solar system quickly.
So what do you think about it? And do you guys think building something like this would be worth it?