Let's not overlook the countless thousands that will still be able to play on their mobile devices and spend money for WGT goodies. Slap me if I am wrong, hug me if I am right.
The "countless thousands" playing on mobile devices were already playing on them, the income was flash and them. I don't imagine too many going from playing on the flash game on their computers to playing the other game on their phone.
Also I don't really see those playing on the commute or whatever paying £200+ for a good set of sticks or £10 for a set of balls or whatever. Some rentals and a few £'s for some magic is as far as the majority will go.
The point is that it'd be stupid to leave the countless numbers (I'm not sure where to pitch them) of the 10m downloads playing on flash behind until they absolutely have to. That's why I don't think the flash game will end on Dec 31st.
I don't think physical contact in either mentioned form, or any other, is merited :-)