Getting rediculous if you ask me.

Are any of these "Linux distros" compatible with each other? Will we be able to run Meltemi apps on Tizen?

Just seems to be another Betamax v VHS, Blu-Ray v HD-DVD scrap but with more players in the field.

To beat iPhone and Android they should be working towards a common ground of cross-platform compatibility. This, I believe, is where Nokia have got one thing right with QT, (if it's all they've got right so far).