You describe FOMO -- fear of missing out.
A lot of what gets announced and contributes to the illusion of constant change and "so much happening these days" amounts to fad and fashion, mostly short-lived and niche. You don't have to jump on every new shiny thing. Ask yourself, would you want to work for a company or client who constantly chased fads?
If some new thing gets traction, last for a few years, grows a developer base, and has successful products that use it, take a look and see if it fits your work. If it just "sounds real neat" maybe play with it but don't change course or waste a lot of time -- wait to see if it goes anywhere.
No one can learn all of the actually useful tools, languages, frameworks, much less the niche and ephemeral, so don't stress over it. Truly useful and innovative things prove themselves over time.
I focus my time and attention on tools that seem to have staying power, make me more effective delivering value, and that I can get paid for.