Back in February, Google made a decision that upset a lot of users by limiting access to the SD card by developers. With Lollipop, those limitations get a lot less limiting.
Photo by planet coline
As Android Police notes, Google is adding new APIs that allow developers a lot more control over where and how files are stored on the SD card while simultaneously making the interaction as effortless as possible for the end user. You can read about the specifics at the source link, but here's the important takeaway for the average user:
All put together, this should be enough to alleviate most of the stress related to SD cards after the release of KitKat. Power users will no longer have to deal with crippled file managers, media apps will have convenient access to everything they should regardless of storage location, and developers won't have to rely on messy hacks to work around the restrictions. Of course, these features are still specifically a part of Android 5.0 (and above), so it will be a while until these benefits can truly materialise. At least we can all rest easy knowing that the future of Android does not involve dooming the SD card to obscurity -- it's actually balancing usability and security.
When we posted about the previous limits, many users expressed their disdain. Hopefully this will alleviate some of those concerns. Ultimately the end result should be more secure, more powerful, and less confusing file management for all.