My guess (and it's only a guess ... a very uneducated and unenlightened one at that) is that there won't be much of a Vintage Drum market (as we know it) in 30-50 years. Nothing really stands out these days and remarkable or innovative or cutting edge. Recording has progressed to the point that you can make most any drum sound great in the studio. We are witnessing the lost art.
I don't mean to come across as a nay-sayer, but there really is nothing new and radical these days. It's all just stair stepped upon what once was.
The solid shell and the ply shell were introduced ... a very long time ago. As far as using different woods ... the Vintage Drums have that in spades; African Mahogany, Beech, Birch, Maple, Oak, Cherry, Walnut, etc etc etc etc. Bearing edges were worked to perfection in the 50s through the 70s. There's really nothing new or earth-shattering these days. The hardware innovations came with the big four and a few European brothers ... and was stolen/built upon by the Asian groups. Heads were changed over in the 50s with improvements ever since. No innovation, though.
What's left???