One scientist developing the process specifically mentioned bladder cancer patients when he talked of who could benefit in the future, if the technology is successful. So hopefully it's not just children with Spina Bifida who would benefit.
From what I've read, the problem with the new bladders is the patients still have to use a catheter. But they hope to solve this problem too. This would theoretically make a better neo bladder or pouch than colon tissue since the colon tissue is considered too absorptive (is that a word?)
It's amazing what they are doing now. Last year I needed extensive gum grafting but didn't have the tissue for a transplant, so they sewed in a cellular matrix (donor tissue) into my remaining gums and then over 3 months my body took over the matrix and grew gum (cells)... quite a dramatic change. I had no idea that was possible.