Thankfully, it seems there is hope on the horizon. Luca Todesco, known on as @qwertyoruiop - an Italian developer has posted screenshots of the iOS 9.2.1 beta working with Cydia – the jailbreaking app and tweak store app.
The release puts to bed rumors that it was now impossible to jailbreak iOS, however, even Todesco admitted that iOS 9.2 was proving much harder to jailbreak than iOS 9.1: