I really wish we as a community just set a date and ported. As it is right now there's almost zero chance that the project I'm working on will get ported to Python 3. I'm not sure what it'll take, but I really wish we were passed this stage.
That said, who is central enough to put an "end" date on Python and "force" people to move over?
Guido van Rossum?
I'm not in the Python community - I barely know the language itself - but from the outside he seems to be a central figure? Doesn't he have enough authority to pull this off?
That's why there is still lots of COBOL in the world and why Python 2.x is going to live for many years, far past the 5 year predicted end of life. It will be far cheaper to make new releases of Python 2.x than to port the millions of lines of existing code.
Python 3 is nice, take a look at it. It probably will be easier porting than you think. However, don't feel like you are forced into moving to it. Python 2.x will continue to be around.
The thing is there is no "community". There's a core team, smaller teams around some projects with their own ideas, and a huge number of individuals and companies using Python, each with their own needs, use cases and timelines...