So, most pictures I found on-line of Rhynchostylis gigantea show white flowers with varying amounts of magenta or purple, in the form of dots, blotches, and labella. Except when they're solid purple, magenta, or white. And there is also a variety, R. gigantea var. vivaphandhul, which is apparently orange and pink. And, well, 'Orange Star' is apparently also pink sometimes, despite the name,1 and now I'm adding my photos of this pale pink/coral bloom.
Which all sort of raises the question: can you call any old orchid a Rhynchostylis gigantea and get away with it? As far as that goes, I'm not confident that I could prove, in like a court of law or something, that I myself am not merely an uncommon clone of Rhynchostylis gigantea. Maybe the entire world is just one Rhynchostylis gigantea after another, all the way down.
As strange as it is to have a species that can bloom in so many different patterns and so many different colors, the ID is apparently legit: it's just a species with a very large natural range2 and lots of different clones available. They're also, as the name would suggest, and the linked photos earlier will attest, capable of becoming very large, though this particular specimen was small, maybe a foot / 0.3 meters in diameter at most. Bloom spikes can have hundreds of individual flowers on them, and of course there can be several bloom spikes to a plant.
They're also supposed to be strongly, sweetly fragrant; it's apparently incredible. I don't remember noticing any smell from this plant at the show, though. So I've seen a specimen of an enormous plant that grows huge, many-flowered, highly fragrant spikes of white/magenta/pink/purple/orange flowers, without getting any of the actual experience of seeing an enormous plant with huge, many-flowered, highly-fragrant spikes of white/magenta/pink/purple/orange flowers.
Ah. There I go again, expecting orchid names to make sense. I should know this by now.
2 Wikipedia: "Myanmar, Thailand, Malaysia, Laos, Cambodia, Vietnam, Hainan China, Borneo, Bangladesh and the Philippines"