It's no worse than the current situation, where most projectors only take VGA. If you have a MacBook Air or older MacBook Pro, you already had to carry a Mini-DispalyPort adapter regardless.
If you own a projector, you're used to keeping adapters around for different computers. If you give presentations frequently, you're used to keeping adapters in your travel bag for different projectors.
If you own a projector, you're used to keeping adapters around for different computers. If you give presentations frequently, you're used to keeping adapters in your travel bag for different projectors.