Cyan features

[cwahsayz]

What are the new features available in cyan?is it worth to update from dp8.1 to cyan?

 

[dKp1977]

DP 8.1 (or even official, no matter) = OS, Cyan = firmware. At the current state you can't even update to Cyan, if you're using the DP of 8.1. The only way to do so is by rolling back to WP 8.0 and start updating from there, until MS fixes the Bitlocker issue and starts rollout of the Cyan udpate again for those running DP.
Being a firmware update, Cyan doesn't offer much feature wise, it's mostly optimized drivers.