Delightful variation on the conservatory - a hexagonal wall of arched windows under a glass doomed roof with quarry tile floor makes for an intimate dining room. Maybe mirrors could be used in lieu of windows?
I used to love sitting in the solarium playing cards. I think a sunroom/conservatory is a great place to relax. I think it would be awesome to have one that's so sunny I could grow plants there, like the greenhouse at the Chocolate Museum.