These luxury home mainstays may be gone in 20 years

New York

SOME real estate amenities are eternal - a sweeping view across Central Park, for instance, or a doorman who knows your favourite driver. Others, though, might prove unexpectedly faddish: What seems like a must-have today could vanish in the developments of tomorrow.

Here are four surprising staples of the luxury real estate market that specialists predict could soon become obsolete.