THambrecht
So I think the best what Cakewalk can do is to make their software compatible with the common protocols to other hardware. Or integrate them like the Console 1.
On audio interface level, Sonar already support all existing protocols (ASIO, WDM, MIDI).
On control surface level, Sonar already support most common protocols (MCU and EUCON). With AZ Controller, it support OSC and Game Controller protocols.
Internal DSP routing inside interfaces (RME, Motu, Digital Mixers) is not exposed in common way. OSC and Web protocols, used in iPad apps for these devices, have no common components.
Most recent devices do not support "common" protocols and explicitly use "proprietary" communications (Nectar Panorama, NI NKS, Console 1, even Presonus Faderport is not publishing its MIDI table).
Note that supporting a protocol does not mean the integration. The most difficult part it to map the protocol into DAW functionality.
Current integration of Console 1 is not between the device and Sonar, the device is just control plug-ins from the same company and can perform several primitive operations inside Sonar. That does not make it a DAW controller.