After further checking, I think the opinion in the article is good.
The ballet DVD, I have found, is put out in DVD, HD-DVD, as well as Blu-ray. The advertizing blurb I had from Opus Arte only mentioned the Blu-ray edition, but their catalogue has the options.

The local cable company has a passel of HD channels, as well as movies on demand, and are pushing their HD box and services. Not much that I really want is there.

I will wait until my present standard (but OK to me) TV blows a piston or whatever, and new stuff is actually needed, then I will think about it again.

John in Kansas, thanks for the link.