IMS a buzzing reality

IMS: mostly a theoretical concept that might have the far reaching consequences of bringing disaparate networks together. But how soon and when is the key question? Convergence doesn't happen just like that. Look what is happening to seamless calls between wifi and mobile networks. Mobile carriers can't loose business. However good the 'seamless-transfer' concept is, it is in state of technology stalemate today - can't become real anytime soon.
Conceptual IMS is gaining the markitecture momentum.
-You have be IMS compliant aka IMS mapped.
-You ought to have SIP
-If not in mobile space throw in a few terms HSS, GGNS and you are all set!
This leads us to a whole new fantastical world of terms, standards bodies meetings, conferences, discussions; it satiates a concept thirsty industry of a buzz word with maximum hits on search engines