Whatever app starts to be compelling, may even be your house.
Imagine all your ebooks on a shelf like a library, your music on a cd rack, and you can browse them almost like physically. Imagine working outside with a view of the ocean you don’t have. Imagine porn being going into a virtual room with specific lighting and music. Heck, imagine sitting on the toilet and have your tiny, moldy, outdated bathroom appear to be a vast Roman bathhouse, or that outhouse on the edge of a cliff