The old C151s, most of the refurbished C151, the C651 and most
of the C751Bs do not yet feature this though, or at least I don't
know of them because perhaps I have been riding the more or less
the same group of train numbers daily. 
I thought it was mentioned earlier it was a poly project? So now
the news is that its a poly project that will be implemented
all-trains wide?
With the new announcements and chime, and active route map display,
and refurbished interiors, the C151 will certainly feel very
different next year (but of course we got a glimpse of it now
already)..........................