It isn't only tree work that has manufacturers pumping out new products. Woodworking is a huge hobby in the west, to some extent worldwide, and you can add in the relatively small percentage of professionals. The people that sell the tools can only be eager to offer new stuff based on the advertising that I see. Gizmos to check the angle of your saw blade or depth of cut, measuring tools, greater ease in drilling holes....it's never ending. I have to wonder if that stuff gets predictably sold, or it's more just throwing it out there to maybe get lucky. If you've been working with wood for some time, the majority of new goods seem to be ideas with minimal purposefulness. An interesting thing about it, is that the level of accuracy achievable with the new tooling is insufficient for precise work, you still have to check things in the old ways or go to the old fashioned method to get precision for real good work that reflects emotion invested in it..
A lot of extra money floating around in the US, one reason for such volume of new goods hitting the market. Lots of doctors have woodworking as a hobby, I'm told. People spending money is good for the economy though, so don't be too down on it.