As much as they are billing it as 4K projection, I don't see how that's achievable in 3D. The only projector currently capable of generating a 4K image is a Sony 4K. But as soon as you show a 3D image in "tripple flash" with polarised glasses, it drops to 2K.
It still looks stunning in 2K, but I'm not convinced this will actually be shown in 4K. Unless they have spent a couple if hundred million dollars and developed some sort of bespoke 4K 3D capable projector.
And as for down time, expect some. Projectors are seldom installed overnight. Especially Sony 4K's. These things are frikkin huge.