You've got to give them credit for being innovative! Yes, it will be sort of a knockoff of National's O-Line, but even better (and higher). Is there any worry about one of the orangutans falling from that height?
As for the Beacon of Hope, I love the idea of adding to the city's skyline. Make the Zoo one of the things people remember most about Indianapolis. There's a good chance the Super Bowl will be back in Indy in a few years, and if so, all of those visitors will remember seeing that tall lit-up Beacon of Hope, only a mile or so from the Super Bowl stadium.
My only concern is the same as SnowLeopard's -- there's absolutely nothing "natural" about this exhibit, nothing that emulates the orangutan's natural Asian habitat. But even so, Indianopolis won't be the first to do this with an ape exhibit.