While I can't speak to the creator's definition, I think a well established set of credentials for a beer table are:
Looks outstanding. Like the example provided above.
Sturdy. Must support beer. Must also support those drinking beer.
Heavy. Must be heavy enough that it can't be easily picked up and thrown at the TV in the event that some sporting event doesn't work in a manner which causes the majority at the table to win their bets.
Rectangular. Round tables are no good because when you tip them over for cover during darts after two for one night, round tables leave your knees exposed.