Halcro -
My original post was correct then, the major advance is the arm tube. As you have articulated there are many other aspects to this arm, many of which have been used before. If you really want to debate the no headshell then look at the Ediswan Arm of 1955 - this is a monocoque structure with cartridge AND phono built into the arm, even had a volume control on the arm.
Seriously though mounting an armboard on magnets and dialing up the softness sounds like a tone control to me. I'm firmly in the camp of having a rigid closed loop between cartridge and groove. No I dont use the Vector as my own personal preference for tonearms is
1. Tangential tracking air bearing
2. True unipivot
I'm happy to acknowledge the likes of Continuum pushing the envelope and challenging current thinking on arm tube design and performance, but one must also acknowledge the designers gone before who have designed, developed & articulated many of the ideas used in the rest of the arm.