Wonko, do you have anything to say related to Win8.1 build 9471 (if you have it)?
I normally DO NOT use (or abuse) leaked builds, I can wait until an official version is available.
Specifically, IMHO anything Windows 8 and conversely 8.1 related is either unuseful, or bloated, or crap or all of the three together.
I make a (due) exception for Server 2012 Core and of course for any well-built winPE 4.x (BTW, will we call PE's made out of 8.1 PE 4.1? ) and or any Windows 8 install which through EXTENSIVE tweaking has been reduced (or enlarged) to become a working OS (without the crappy "modern" interface).
I mean, I have always liked - since I was a kid - Meccano and Lego, and - within limits - Ikea stuff, but if I buy now a kit-car, I expect to pay for a kit-car, and not for an assembled car that I need to disassemble and reassemble to have it run decently (if not smoothly).
From what I have seen on the 'net the differences between the "Preview" and this "leaked" build are almost all - one way or the other - some added nonsense when compared to the already nonsensical enough preview.
The added ability for the Enterprise Admins to wipe remotely areas of the device is IMHO something (part of the more general BYOD nonsense) that will give hackers great amounts of satisfaction whilst the enhanced (and by default enabled) encryption will bring an end to the joy of many data recovery companies and final users seeking for their lost data .
On the other hand the Smart Search will make happy each and every user caring for his/her privacy.
BTW, it is "queer" how seemingly many "new" features have creeped into this build 9471 when compared to the Enterprise Preview which was released officially much later than the "normal" 8.1 preview (unless I mistaken the Enterprise Preview is 9431)
Let's hope that the "core" files actually have some enhancements (useful in our PE's).