As for new & improved, I think there's so much out there that it becomes new & improved to us because we've never been exposed to it. As for reading the reviews, well, it's sorta like buying a new car. A lot of hype from the manufacturer/dealer & ultimately end user. Sure it's a great product but ultimately you (we) have to make that decision based on our personal preferences. I'm not entirely stuck in the "if it ain't broke don't fix it" mindset as I became caught up in a furious upgrade/audition process (as compared to a rational & laidback process) that did lead me to a cable manufacturer I'm happy with but it took a lot of work to get there. I actually enjoyed the journey & learned a lot about different cables & how they affected my components & how that compared to other listeners perceptions.
It's nice to know the manufacturers are constantly experimenting/revising their gear but that doesn't mean it's better than what's currently on the market. New & improved doesn't mean better although it's worth a look.