Re: It's all in the materials
Coat or not, let's have a think..
The building has an outer diameter of 1560ft, giving an outer circumference of about 4770ft.
The inner diameter of 1250ft gives an inner circumference of about 4200ft, so a total of about 9,000ft
At four stories, allowing about 10ft per storey, we've got a total window area of about 90,000ft^2, or about 8300m^2
An ipad has typical dimensions of 240mmx186mm, or about 44600mm^2, or about 0.045m^2 each
To cover the full 8300m^2 would therefore require approximately 184,444 ipads. To have one on each side for facetime windows would require a shade under 370,000. At a typical retail price of $500 for an ipad with retina (because you can't be skimping on windows!) that gives a cost for the exterior ipads-as-windows of...
So, er, where's the rest of the money going?