SCOTUS has declared (rightfully so, IMHO) that all states must honor and recognize same sex marriages from other states. Do you think this is any indication of how the cannabis legalization will go?

Marijuana has been legalized and regulated in several states, sometimes for medical use, sometimes for both medical and recreational use. Same sex marriage was also recognized on a state-by-state basis, until today (6/26/15), when SCOTUS declared that same sex marriage performed in one state must be recognized by all other states.

I realize these are two completely different and independent issues, but is the process comparable? Do you think this is the way pot and hemp will be legalized and decriminalized on a federal level in the US?