Whatever the purpose may be, I hope Microsoft releases it soon. I personally haven't been touched by their firmware, even though my SP2 did update with the keyboard attached. I only had one night where the tablet turned on by itself and ever since then I haven't had any issues (knock on wood). But that doesn't change that a lot of people are having issues.
I don't know if it's 3/1000 or 300/1000... But shame on them for not releasing at least a work around! I've seen many people just hibernate instead of sleeping. I have also seen people say that doesn't help (while it does help a lot). I think Microsoft should just push out the update ASAP rather than saying "Oh, on the 14th!"
Regardless, I still love this device. It has great battery life (with screen on) and it is just so fast. I have very little complaints. Every company has hiccups. Even Apple, Google and everyone else! So don't hold Microsoft up to higher standards just because... Also, a rule of thumb is don't fix something that isn't broken... Ergo... Don't update your drivers if your device is working just fine, or at the very least, wait for others to comment on it if this device is your life or death device on which you rely for work. I have seen people complain how this is their only device and others that say they are using it as a photo frame because for work it's useless. Well, don't let people update your drivers for you if it's that imperative for you!