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@oldtimer the general speculation is that any interest will come mid-2014 in time for 2015 or 2016 when outsiders have viewed how the engines work and what is the best design so they can copy it.
The manufacturers are too big to just leap on projects like this - they'd have to be considered long term.
As for them being a waste of time and money -
a) we don't know how they're going to perform yet
b) the initial cost is steep compared to the current engines, but because of the various limits on number of engines, fuel flow and performance, they should be more reliable and the cost will fall.
c) its not just green credentials, its relevance to the car industry to attract the other manufacturers back. For example, all the Japanese manufacturers are heavily investing themselves in ERS and Hybrid drive.