The new firmware update, 2.02 , is a minor and optional update that is said to improve Playstation Vita software stability during use of some features. What exactly these features meybe unknown.
The new firmware update is not forced you to update at all, it is usual for you to update for some bug fixed.
" PS Vita update v2.02 is coming soon. It's a minor, optional update that improves software stability during use of some features."
So, It is ok to update your system.Now sit tight for Ninja CXrtmas@@@