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.
Wouldn't this be great for a runner down the wedding aisle or cute indoor outdoor carpet? Take a plastic lace tablecloth and spray paint it on lengths of colored fabric or burlap. Repeat for the length of the runner.