You mean this feature request? - Counter - Android and Windows Support
It was added to interactive signage feature, which will be developed for 1.9 series - Interactive Signage
As Dan has mentioned, its only to ensure the mechanism is in place to allow a counter add-on to be written, not to actually write one.
I any case, any work regarding it will take place in 1.9 series, which will begin after we fully release 1.8 version. (we’ve released the 1.8rc1 yesterday).
We can’t commit to any solid date for 1.9 for now.