My Samsung Galaxy S + one of Samsung TV nearby is playing it exactly like that by using much more user friendly protocol stack. Meet UPnP/DLNA. Moreover, right now I am watching a quaterfinal of Heineken Cup by magically streaming video to the TV over the local network. Meet UPnP/DLNA once again. And there's more! This December I spent a week in Samsung's R&D working with their extension of UPnP that will deliver cus…
Sorry, but I've tried to use that crap. It is a real PITA to get working, and it stops working for no apparent reason. The implementations are all over the map. Interoperability is horrible. Also, it doesn't have a standard way to just automatically start a video playing from a local to a remote device. It pulls. It doesn't push. So whatever Samsung does to achieve AirPlay-like functionality won't be standard.
The fact that you've used loosy implementation doesn't mean that the spec itself is a crap.
DLNA is not a silver bullet and has some flaws, but it is thousand times better then AirPlay just because it is more open and does not require specific hardware to accomplish simple tasks. And what is even more important, at the moment huge amount of work is being done worldwide to enrich the list of devices supporting these protocols.