Yes, you'll need a new display to do 3D. That's where the actual frame separation magic happens. So you'll need a player which can read the secondary "eye" information (which will be a muxed sub-stream, which can use the primary stream for key information, but not the other way around). A receiver which can pass the extra frame's worth of information untampered, which probably means an upgrade there too.
Some of the first 3D "displays" available were projectors. They're using the more expensive shutter-type glasses, which have batteries and need to be recharged. All that's needed from the projector is that it can run at 48 fps for film sources, or 60 for video. Then it floods the room with IR bursts which are received by the glasses to know which eye should be covered at what time.
