Will we see it legalized in all 50 states? Probably some form within the next 15 years. Will we be able to walk into a grocery store and buy it. I seriously doubt it. The negative social stigma is very alive and well. My kids are young and just went through the DARE program in school. It is still being taught in this day and age that one hit will ruin your life.
Its going to take a generation or two for the decades of negative propaganda around cannabis to be undone.