Not the kind of Dendrobiums I'm used to, exactly; the shape seems subtly different in a way that I'm unable to be precise about, and I don't recall ever seeing a Dendrobium with veining like that.
I'm nearly as burned-out on Dendrobiums as Phalaenopsis, because where I used to work, Dendrobiums were the main other thing, besides Phals, we used to get in (it was something like 70% Phals, 20% Dendrobiums, and 10% other), but Dendrobium has one thing going for it that Phalaenopsis doesn't (so far), which is that I've been able to rebloom a Dendrobium. Only barely, granted. (But more than once, which must surely count for something.) But still. Barely is better than not-at-all.
And actually, now that I think of it, my mother, whose track record with indoor plants is . . . I guess the word would be intermittent -- has actually had a Dendrobium for a while and it's done okay. I don't know about reblooming, but with Mom, survival is quite an accomplishment all by itself.
I might quibble with the namers of this particular variety a little bit. Last I knew, it took more than two colors for something to be considered a rainbow. (Even the dehydrated marshmallow rainbows in Lucky Charms have three, and they're made by mentally-challenged leprechauns.) But they're fine flowers, even so.