Regarding the future of metal detecting, I honestly feel that us metal detectorists are being milked for all we are worth. The hobby metal detector manufactureres better hope that Japan doesn't start making hobby metal detectors!
The current state of metal detectors reminds me of the old days when Detroit ruled the automotive world. Back then, when the next years model came out, it would be the same as the previous years model, except that it would be offered in a different color, (available in Crimson Cream this year-woo woo!!)and have another option or two, like chrome bumpers. Detroit auto manufacturers thought that this was all that was needed to make the buying public happy, until Japan got in the act.
The MD industry feels that we are just a bunch of hobby enthusiasts. Heck, we don't need onboard GPS; we don't need the latest technology, we just need another VLF machine with a new name, like maybe the XPX 5000t! (It comes in cool green this year, too!).
Even at the current state of technology, if the MD companies wanted too, they could offer terrific detectors, with awesome technology compared to the current detectors. Imagine having an MRI type metal detector! But just like Detroit of yesteryear, there is no reason to go there. "How about our new model that comes with the graphite coil? It's cool, it's new, it's lighter! (Well yes, it is more expensive, and no, it doesn't really work any better than our other coils....."