Time will tell. Of course if someone else comes out with a thunderbolt to MADI, no reason they cant still use the RME audio gear as MADI is an industry standard. And also note worthy - thunderbolt is currently not an industry standard - perhaps intel and apple need to push it through a friendly standards group - that should keep them busy for a few years - long enough for it to get its connectors changed and re-badged as USB4
Another point of interest - He says it translates to PCI express. PCI express (and the smaller express card interface) is pretty liberals in what the host takes takes for granted in terms of acting on signals. At least PCI express kind of has some physcial protection from shall we say 'hostile' devices - ie you have to take the case apart generally, get past phsyical locks in some cases. With thunderbolt - just plug something in and potentially its on the PCI-express bus (in terms of signalling) and pretty much free with some helpful software to do whatever it likes. I wonder just exactly how pci-express like it is at the host end...
Companies have allready got rather paranoid about people plugging in USB sticks and group policy banned them entirely in several organisations and USB actually has a whole big fugly software stack between it and the host bus. I have to wonder what you could do with an intensionally hostile thunderbolt device just by plugging it in - at the very least probably completely stiff the host ?