Are carbon fiber speaker cabinets inherently better than wood or metal ones

Yes, there are carbon fiber acoustic guitars available at various price points. They are much less affected by changes in temperature and humidity than wooden guitars. RainSong is one popular brand while McPherson cater to fatter wallets. 

Nobody has addressed the more important question I raised. Does the malleability of carbon fiber which enables it to be molded into round or rounded cabinets improve the sound of speakers? Of course room acoustics make a huge difference in achievable SQ, much of that due to the shape/dimensions of the room. I would bet a oval shaped room would sound best, or perhaps horseshoe shaped. Is the same true of speaker cabinets? Can it give more of an open baffle sound without the negatives of open baffles?

Westheadley 

So If I am reading your response I would sum it up to simply say you know nothing about it. 

It’s a custom designed material used as an alternative to wood so probably inherently better suited for the task. Wood is wood.

But either way can work well if done right. Done right usually cost somewhat more.

Is that what KEF uses in their LS 50s, Blades, etc? I don’t think so but a big thumbs up whatever it is they use. I do not miss the wood there.

The Blades were initially intended to be made of carbon fiber but they switched to fiberglass, probably due to costs and degree of difficulty 

Carbon fiber resonates at an extremely high frequency which are very easy to control and isolate and direct away from the large and very thin drivers. You have to know what you are doing however.