Built in storage. This is pretty much our attic bedroom! That's a lot of storage and nice touch is the niche for a TV. It may be possible to use IKEA chest drawers to acheive this. Or find a talented carpenter.
Attic Bedroom Closet Design, Pictures, Remodel, Decor and Ideas - page 9 - sublime-decor. I have the perfect wall (with attic behind it) to do this. I've often thought of making an easily accessible closet there.