Might be profitable for the early adapters. Burn a few images of Jesus or some Saints onto the bread of your choice, snap a picture and post the slice on EBay for bid.
Of course the novelty and the EBay market for sainted bread should collapse soon thereafter. But maybe Valentines messages or Season's Greetings on morning toast might survive to be a yearly gimmick. I would get a laugh putting my face on a slice of toast with an "Eat Me" message for Valentine's Day. Give the wife a whole new take on Breakfast in Bed.