Board Thread:General Discussion/@comment-28712597-20160706180052/@comment-28905095-20160709011454

But then again, what frame of reference are you using when determining not-implemented? The main Minecraft? If not, the list could be endless, i.e. Dogs, Guinea Pigs, Air planes, Bikes, and so on...

My point is that most likely the not-implemented items, are items already found in Minecraft, which could/will appear in MCPE in the future. Ergo, possibly upcoming.