Well as to Daisy structure, it's the sort of thing I can see being useful for intensive study but not really if your just reading for pleasure, so it's sort of nice to have but not really worth the extra player or random program.
With the Id tags thing, well that strikes me more as theory than practice. these days pretty much anything with audio can be copied either by directly wripping the audio or just rerecording the thing, so as I said while daisy might be a nice sop to the publication industry it doesn't make as much practical difference in audio terms, heck I confess I have on occasion dedasified the mp3s out of a book and retagged them just because I'd rather play then on my Iphone than either haul around a less than efficient dedicated daisy player or laptop.
Regarding Braille Cae, well 500 usd is certainly better than 1500, though I'm still not personally convinced given the amount of information shown and the flexibility of most screen readers (including Nvda and voiceover).
Regarding companies, well I suspect a mainstream company won't do anything about a braille display given that it's advantages aren't obvious over speech and it's development would be more difficult unless the displaying of braille was a side product of technology that could be useful to sighted users.
For example, the reading aloud and speaking of Siri on Ios at least are bennificial to sighted users, and while Apple (and possibly Google), have gone above the call of duty, or at least legality in the development of speech there is no denying it's not just! blind people that have talking phones.
I could in this way see a braille display as an application of say a more widely used tactile display for touch screen control. Such a display could for example have tactile buttons instead of keys and thus facilitate touch typing, as well as be able to use other forms of analogue controls like sliders and roaters which would be of bennifit to sighted users.
Then again, sinse most sighted people considder touch in the same sensory rank as taste and smell, ie a background to life that can at most be used just for it's pleasurable input and not for gathering information about the world, whether mainstream companies would considder the advantages of a tactile display to sighted users enough to actually develop one is another question entirely, though as I said unless either that happens or braille displays become very very cheap I'm not sure how long braille itself will continue to be viable at all, and the less braille reading or writing is used, the less call there will be for devices like packmates and such, heck there are already Vi kids in school who are not being taught to read braille sinse it's demed as unnecessary.
Whether it is! unnecessary is another debate entirely, but certainly the bennifits to using braille aren't helped by it's uneasy relationship with modern technology, still less the exclusivity and money grubbing of companies that produce braille specific devices.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)
