Obi-Wan says: This is not the update you're looking for.
Truth, every little bit helps but based on the description it's not the Sleep fixing, Battery life enhancing, Display and every other driver fixing, stability enhancing cure all. That's for another day.
January 2016 updates
The following update will be listed as “System Firmware Update – 1/27/2016” when you view your update history.
- Surface Embedded Controller Firmware (v103.899.256.0) adds battery charging enhancements and thermal tuning.
Id expect maybe less aggressive turbo mode usage which might cut back heat generation, fan usage, and save a little battery. unknown what charging enhancements will address... presumably faster or more efficient charging but might address connected not charging conditions or change the ramp up/down of charging.
- Surface Fingerprint Sensor driver update (v2.2.10.6) improves accuracy.
Wont impact the majority of users that aren't using it/don't have the fingerprint keyboard.
- Wireless Network Controller and Bluetooth driver update (v15.68.9037.59) improves access point compatibility and throughput on 5Ghz networks.
Another round of wireless tweaking might be good for some and not so good for others, only time will tell.