Currently the jailbreak for 4.4+ is tethered, which is a bit less convenient than an untethered version. If the features added in 4.4 excite you it may be worth updating; however, the previous 4.3 version will continue to be supported so updating is not required.
The full list of changes included in 4.4 is below:
AirPlay Mirroring: Now with video mirroring – wirelessly stream what’s on your iPad 2 screen to your HDTV.
Photo Stream: View photos recently taken on your iOS device and pushed to your Photo Stream in iCloud.
Trailers: A whole new way to browse and view hundreds of the latest theatrical trailers.
National Hockey League: Watch live games. View highlights, scores, and more.
Wall Street Journal Live: Watch up-to-date news, business commentary, and financial analysis from leading experts.
Apple has also added support for subtitles in Netflix and three new slideshow themes: Photo Wall, Flip-up, and Shifting Tiles.
How do I update?
Seas0nPass will default to the latest untethered version, which is currently 4.3. If you want to use Seas0nPass to update and jailbreak a newer version simply follow the steps below.
1-Download version 4.4.2 (9A336a) and save the IPSW in an easy to find location.
2-Download the latest version of Seas0nPass.
3-Open Seas0nPass then Option + click (Mac) or Shift + click (PC) the Create IPSW button and select the new IPSW file that was downloaded in step #1.
4-Seas0nPass will complete the jailbreak and restore process automatically.
5-After the restore is complete, move the AppleTV to your TV and follow the steps for performing a Tethered Boot.