Just to confirm, the Area 120 labelling is meant to do exactly that. Area 120 projects do not have long-term commitments, explicitly. But the goal is for the successful ones to graduate to be a fully supported Google product and gain those commitments at that time (we have a number of examples of that happening).
IMO it's still not clear from a single glance. Either no Google logo anywhere near experimental stuff or a super visible uniform "Beta/Experimental" logo as long as a product has no long term commitment.
I'd say they should use the same logo whether it's an area120 project, an experimental chrome extension from YT team, some research experiment, some VR experimental app, etc.
