I don't think 24 & 45 mm TSE lenses make sense for digital, since there're a lot of software that can correct the perspective with just a bit of loss of IQ, and you can get a really superb lens like 24-70 2,8L with better IQ and the price of just one lens.
A very different stuff is the 90 TSE. I use this lens for portraits, with the tilt focusing feature, that make your work apart from the competition. I also use it for product catalog, no other lens can make it better but view cameras. And finally, I find this lens being a nice macro lens, as good as 100 mm macro, but with the tilt feature that allows you to compose your picture unaligned with the center of the subject.