Doing a search on the internet, it is quite easy to find Annual Reviews of the Top Ten Diving "Piece of Equipment" (Computers, regs, BC's, etc.) on various websites. To what extent are these reviews generally helpful to new divers, or are they simply misleading ?
They are misleading in a number of important ways. The lists are built on a foundation of untruths and half-truths:
1) That there is innovation in dive gear, and that new gear is better than old gear.
2) That some new gear is materially better overall than other new gear.
3) That better gear will improve your diving safety.
4) That better gear will improve the quality of your diving experience.
5) That good divers seek out good gear.
There hasn't been any useful innovation going on with basic open-circuit recreational dive gear for 20 years except in a few areas:
1. Cost reduction through greater use of plastics and modernization of production techniques, which has largely run its course.
2. Development and improvement of the dive computer, which is ongoing but has slowed.
3. Better drysuits, though not much improvement in the last few years..
4. Some innovative BC designs including travel BCs and back-inflate hybrid BCs. (Whether these innovations are useful depends who you ask however)
Now, at most, there are two or three really innovative products that come out every year. The rest are just flash and color and cost reductions and stylistic changes.