Although there were numerous changes in build 10147 from the official preview build — 10130 — there weren't any major feature additions. With the official launch just a month away, it is likely that most of the builds from this stage will focus on polishing the user experience.
We'll let you know how this latest leaked build varies from 10147 later today. Given the nature of the leaks, we advise that you refrain from downloading non-official builds. In the meantime, check out what's new in build 10147: