yes ! a photo and much more - see this suggestion http://glpi.userecho.com/topics/215-associate-documents-to-some-dropdowns-eg-computer-models/

definitively needed !!!!

example when remote managing an IT I need as much details as possible on the pc

i.e. just for the BIOS : "which key to press to open BIOS" / screenshots of the bios ..etc....

This suggestion is also similar to this one http://glpi.userecho.com/topics/292-photo-of-items-computer-monitor-network-device/