I can't emphasize enough how significant a product I believe Delta 3200 sheet film would be. Delta 3200 is about the only remaining "romantic" film, kind of the way Royal Pan was in its day. I've not been able to duplicate the feel of the film with Delta 100 or 400. Its high speed would open up new opportunities for hand held 4x5. And if made in 8x10, grain would certainly not be an issue.
I shoot a lot of Delta 3200 in 6x4.5 and I've always admired Ilford's making the film available in format larger than 35mm.