UcD = Universal class D. which is a technology, not a company, invented by the man who wrote the article I linked to.
I think Bruno was much too pesimistic, a couple of companies have purchased a license to this technology and I'm sure there will be more to follow.
Some will want to make their own audiophile grade class D amps from scratch. Can you imagine ATC deigning to license technology from another company?
BASH is a digital switching class D based architecture developed by a company named Indigo. Several manufacturers have licensed it. Polk is now using it in their LSI subwoofer.