I understand that the media would be linked to the public key. It could be verified who did post when what picture as an example; the picture would get is own Nostr note id and can be searched for etc. Currently, the pic is uploaded to a "simple" media server that provides the URL to the pic, but nothing more.
The NIP 95 discussion has many aspects of the block-size discussion in BTC. More files on relay increase hardware requirements, which can make it less feasible for people to run a relay. On the other hand media can also become more censor resistant.
There are pros and cons.