Apple's new Chicago store wasn't designed for snow
spudart.org
spudart.org
Have also been to the store and the blocked off area doesn't impact egress/ingress.
The real flaw of the new Apple store is its glass walls and their tendency to trick birds into flying into it. The ice thing is a non-story.
(I'm a UK resident, we handle snow by bringing the country to a standstill for 48 hours and complaining a lot...)
At first it seems like a design flaw, but then how did the city zoning and building permit process not catch it? Maybe they don't care or there is no ordinance and therefore Apple's architect and builder doesn't care either. It may be entirely intentional and by design.