LogFAQs > #966540221

Realistically, nothing to do with astronomy or space exploration is going to affect you personally unless you're actively working in the field. Even if Webb yields a photo tomorrow of actual aliens having a barbecue on a second Earth <10 light years away, there's zero chance you're going to meet those aliens or visit that planet in your lifetime.

That said, the vast quality difference in images is a critical part of identifying exoplanets. The gallery linked earlier includes a spectroscopic analysis of an exoplanet that reveals water in its atmosphere. Hubble didn't detect water until it had been in operation for 23 years, Webb pulled it off with greater detail in 6 months. Similarly, Hubble took 3 weeks to generate that image of the Southern Ring Nebula, Webb took 12.5 hours (~45 times faster), and that faster data collection makes it much, much easier to find new objects of interest. In pretty much every way, Webb is just plain better at helping us learn more about the universe than Hubble can ever be, which is a huge deal for astronomy.