I finally got my hands on this beta and quite frankly it isn't much different with a few exceptions (listed below). Others have written about how unstable this beta is but I haven't had many problems at all....the main problem is the NullPointer exception when you take a picture. Basically, it doesn't like something in the "Save" function and dies. So the camera doesn't work but all else seems pretty stable (for a beta).
The main things I have noticed are as follows:
1. Media Player
a. sorts music like modern DAP by Artist, Song, Album, etc (refresh and scan is slow but results are useful)
b. adds voicenotes
c. Media interfaces updated (music and pictures is nice, have not tried any videos or voicenotes)
2. Updated interfaces for most of the PIM apps but not much new in functionality that I can find in my 24 hours of using it
3. Ability to add folders to organize icons. Again, a nice touch to the interface but nothing earth shattering
4. Here is the kicker that everyone has been waiting for A2DP and AVRCP support for Bluetooth...for the non-technical this means stereo bluetooth and ability to use remote control functions from modern BT stereo headsets. I have not tested with any but the profile is there and plan to test shortly. I will report back.
Overall, this looks like it will be a solid upgrade, now only if they could figure out how to do an OTA hardware upgrade to make my 2.5mm headphone jack 3.5mm....that would be an amazing accomplishment if you are listening RIM.