Carbon fishing rods certainly. I am old enough to have experienced the crossover and what an improvement they were.
Boilies, specialist fishing techniques generally becoming better known, a mixed blessing perhaps but every water will have someone with the rod pod and alarm set up. Alarms have been improved exponentially since the days of the Heron.
Online infornation, particularly the tackle review, advice and opinion forums, what a help they are.
Blogs not so much, an excuse to mention the sponsors mostly and few really divulge any information that isn't already well known.
Commercial fishing. Not my cuppa but it has been fascinating to watch the development of techniques and tackle.
Cheap imports, Dragon Carp etc. Bringing tackle down to ridiculously cheap prices, not good for the traditional tackle shop but making the sport accessible to anyone, particularly the young who can start fishing with gear that o.k., won't last forever but is perfectly useable. Better than me with dads rod with the broken tip and reel that didn't work properly.
All the best.