In markets where Comcast has actual real competition, they "include" the unlimited data (aka no cap) with no extra charge when you sign up for their gigabit plans.

You pay for their highest tiered and highest bandwidth plan and they have the audacity to impose a cap making that bandwidth work against you? Crazy. My household internet usage is quite modest, nothing anyone on HN would call data intensive—casual video streaming being the lion's share, and I blow out 1TB every month without fail.