I'm watching this -- and DCC support in general -- for the needs of higher-current, larger-scale trains. Smaller, higher-current DC rectifier technology is making it easier to build DCC decoders that can adapt to virtually any formerly AC-centric train operation. If the Blunami product line can expand to cover the same range of power requirements and outputs as the ESU Loksound 5L and 5XL, then we'll have some good competition and alternatives to choose from for adapting virtually any 2- or 3-rail O gauge locomotives to DCC with sound.
TMCC/Legacy and DCS are still great, but it's clear from the efforts of both manufacturers of late that they feel the need to move their systems ahead technologically. It's not really that they're playing catch-up with DCC, it's just that component manufacturing has moved on and they need to keep pace with what their suppliers can deliver and what users of the systems are coming to expect in terms of ease-of-use.
Any command system is a sizable investment in equipment, the infrastructure of wiring it properly to the layout, and choosing locomotives and accessories that work with it. I've been watching the development for years, as I own nothing command-controlled -- yet -- and have been dealing entirely too long with finding the intersection of time, money, and space to build a layout. So I have a "blank slate" still available to move ahead with. I do own a nice collection of MPC-era power -- much of it potentially worth upgrading to TMCC. Had I started out a few years ago, that might have been pretty much a foregone conclusion. But modern DCC is becoming a reality for O-gauge and it's getting tempting. NCE builds a 10-amp DCC system that can take AC power as its input -- which means my postwar ZW can be set up (with modern power protection) to run a DCC system or be switched to conventional running. ESU and potentially now Soundtraxx/Blunami build decoders that can handle the power needs of big universal motors -- and offer the ability to load custom sound sets, making for a retrofit option that may be able to provide sound performance much like DCS PS2/3. The JMRI software is available to interface DCC and the layout with all kinds of possibilities for computer-based control. All of it based on interoperable standards rather than proprietary lock-in.
As much as I love the inherent simplicity of conventional operation, it's limited, inefficient, and whether I like it or not -- the future is digital. The single biggest holdback I've had with DCC is that even though it's standardized, having few manufacturers of decoders that can handle larger scale trains has meant that it's all too easy to lose support if a manufacturer shuts down. Choices help keep up market confidence. At least mine.