I'm particularly very wary towards any primate walktrough, as there's always a risk of bites occuring or even the animals getting stolen, in the case of the tiny tamarins (and even the spreading of diseases, but I don't think you're planning this exhibit on their natural range

).
But besides that, I think not only it would work, but also opens more possibilities for other residents. Larger birds, like Black-fronted pipping-guans and Alagoas curassows, and even Prehensile-tailed/Paraguayan hairy dwarf porcupines would be fit if they're given enough space.