Ultimately here's my take:
The bomb will not be real, but the real artistic genius lies behind the hype. People will be standing beside the display, and they'll get goosebumps because they'll be under the impression that the bomb could go off at any time. The control will be out of their hands, which is a pretty profound statement when you think about it. That lack of control brings about emotional response in people. My guess is that it'd generate more of an audience than one would think.
The fact that a wrong number could be dialed, or telemarketers etc, solidifies that for me. Wait and see, you'll see a follow-up article someday about how it wasn't a real bomb, and they (artist and musium curator guy) were playing it up to generate emotion from the public.
It reminds me of wrestling, oddly enough... When a wrestler gets "injured" and you're left to wonder if he actually was injured in some capacity, or whether it's all part of the storyline.
- FA