MQA is a solution in needs of a problem. It will fizzle on the marketplace. Same way DSD will/already is. with 1 TB HDD costing less than $50, the Cloud getting more ubiquitous by the day, the majority of music lovers being very happy with mp3/128k and most people audiophiles included not reliably able to distinguish mp3/320 (or even lower) from CD... What are the perspectives for it? We'll see but I am prognosticating nil.
Maybe so. But, I think the clever hi rez encoding/compression part of it is the least interesting to me as an audiophile. I am more impressed with the sonic potential of the mainly time-domain filter corrections it does, going back to the ADC in the studio all the way to the DAC at playback.
As to the compression, though, it is a clever and potentially useful way for Tidal, say, to offer RBCD and hi rez resolutions from a single set of files on their server: single inventory. It is not so much about the storage space or communications bandwidth consumed, though it is nice and really useful to have that minimized for distribution. That can add up to a huge number for equipment and maintenance for Tidal and others in their huge data centers. We may not care about that directly, but indirectly it could lead to a greater selection, better service and better prices for us, the users.
Perhaps more importantly, it is about the prospect of avoiding mega large, parallel libraries of the same album, largely redundantly, at various, multiple increasing sampling rates. MQA can do that in one library with each album being a single, compact entity for all the available resolutions. I think there are further really tremendous savings in administering that as a result.
Users, of course, have to cooperate by installing MQA capability at their end, if they want its full benefits and access to hi rez. If they do not, they will still have RBCD resolution, as now. Supposedly, even that is improved via MQA by applying its filtering to the recording, though not on the playback side without an MQA DAC.
Time will tell.