"The top two complaints about air travel are: the bathrooms are too big and there aren't enough people on my flight."

So quipped SNL's Seth Meyers recently, after hearing about Delta Air Lines' (DAL -2.62%) plan to buy 100 new 737-900 aircraft from Boeing (BA -2.87%), outfitted with a new, space-saving lavatory built by B/E Aerospace (BEAV). Funny joke, but will airplane passengers appreciate the move? Will investors?

Motley Fool contributor Rich Smith explains...