First i want to share with you that those files are not official by BlackBerry, as they appeared online and maybe at some point BlackBerry will send this update through OTA, but if you can’t wait for it you can download them now.
The files will bring your BB10 device to OS 10.3.3.3057 and there is no change log so we don’t know what is new. The interesting thing is that if you check the files it seems that they are from last July. For most BlackBerry 10 users these autoloaders are the best option to update their devices.
If you installed those files and you see some changes, share it with us.