Going to purchase one of those fake brick wall panels from Home Depot and paint it with mirror paint. I'll probably antique it with some dark brown wax I have too. I think it would be a very cool background. Here is the inspiration.
Could get a custom timber fake wall as a headboard, spaced 30mm off wall with hidden storage and mounted lights etc. Like the shelf detail at top, but this could be lower to function as bedside table...?