Do you work in scientific computing? I think if you did, then you would understand

- Will bpython allow me to control a cluster of python processes to perform my scientific computation?

- Will bpython allow me to create executable documents mixing markdown as well as LaTeX so that I can display mathematical equations?

- Does bpython have integrated matplotlib support, so that the GUI thread of matplotlib runs in a separate thread and won't block the interpreter?

IPython is much more than just an interactive shell, even though the name doesn't suggest more than that.