I think that is an interesting location for an alcohol supply store. The potential lies in the ease of access. Depending upon the set prices, people will likely pick up alcohol at the airport, thereby avoiding going to a liquor store later for relatively reasonable alcohol for the rooms, etc.
So it really depends on the intersection of the price at which it is supplied (taking into account the ease of access) and the amount of demand from party goers, gift givers, meeting with friends people, etc.
It is, nevertheless, a good idea for Vegas. Unfortunately, we will, based on our current trend, never have the same fortunes as, for example, airport travelers in the Schengen area. There is not much like grabbing a liter or two of Pilsner Urquell and prolonging one's time in one's secondary home. CFry