Wilsonara is a cross of Cochlioda, Odontoglossum, and Oncidium; I don't know much about it beyond that. These flowers were at my ex-job a few weeks ago (possibly the same visit when I got all the Phalaenopsis pictures: set 1, set 2, set 3).
This is a cool color for orchid flowers, but the size and shape don't do a lot for me. I'm still more of a fan of Beallara and Goodaleara, with the medium-sized star-shaped flowers. I'd rather have one biggish flower than a spray of tiny ones. I suppose I'd make an exception if it were an Oncidium 'Sharry Baby' or something: fragrance has priority over flower size.
Which reminds me: I still want to get a 'Sharry Baby' sometime. I should write this down.