I think that an easy and attractive method of displaying NFTs is definitely something that people who loves their NFTs would want. You might want to check out this medium post from nigtfygateway https://medium.com/@pierce_85676/nifty-gateway-releases-nft-display-for-open-beta-2c84ce793a3c
While this isn’t a device or picture frame as your idea suggests, it’s an example of one method of displaying NFTs.