There is also the issue of products liability. One article already notes that some companies are offering "marijuana tours" of the State and mentions that one couple on the tour "got so paranoid, we had to take them back to their hotel room." The marijuana of today is very potent compared to years ago. Will people be able to sue for a bum trip? Interesting possibility. What about the liability of a dispensary who sells to a mentally disturbed person? Or if someone tokes up and wrecks their car - is the dispensary liable as a bartender would be?
And do they have to put warning labels on the packaging - like the cigarette people do? Smoking anything is bad for your lungs - is marijuana exempted from this? And who handles quality control? Do they monitor THC and other content and is this printed on the packaging - or should it be? A lot of questions, to be sure. When you productize marijuana, it has to pass the basic safety tests that other products have to.
(Note: The new Colorado law limits possession to one ounce. So a smuggler would have to employ a number of buyers to each buy one ounce at a time, from numerous dispensaries, in order to accumulate enough to export to other States. While the State Police can't bust people for buying an ounce legally, they could go after people "accumulating" marijuana for smuggling purposes. It is unclear whether dispensary records could be used to track users and establish consumption patterns. A person buying several ounces a day would certainly raise eyebrows, if the records could be reviewed or subpoenaed. Will smugglers hire non-users to buy marijuana for them? This would not be illegal, as you can "gift" an ounce to another person, after you buy it. Perhaps Granny might derive a second income by being a straw-man in such transactions. The law raises more enforcement questions than it answers!)
The new law forbids smoking pot in public - just as public consumption of alcoholic beverages is generally illegal. But what about in a bar? Or does that go against the general ban on smoking (I checked, Colorado Statute 25-14-204 covers "tobacco and marijuana smoke"). So no pot bars, unless they have an outdoor enclosed patio - or is that smoking pot in public?