3D TV's, regular flat screen TV's, 3D Blu Ray Players, regular Blu Ray Players?

There's a significant difference. 3D TV's have a very high refresh rate, and you wear glasses that wirelessly sync with the TV to momentarily cover one eye at a time. You get a different image going to each eye, so the illusion of perspective is easy to maintain.

A lot of the movies that have been in theaters in the last few years have been 3D, and they're all out on bluray now.

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Wide screen is what all TV's are now, so that part isn't special.

'Flat screens' went obsolete around 2004 or 2005 (you couldn't buy those tube-style TVs in an outlet store after 2009).

Flat panels are the LCD and OLED and plasma TV's that can be hung on the wall, which are convenient. Plasmas are not a good choice for most people—they don't last long, and if you leave a picture on the TV it "burns in" where you get a ghost image quickly (among other problems). There are all sorts of 3D capable flat panels...how high-end you need to go to be satisfied is very personal.

Rear-projection DLP and LED projection TVs are nice if you have a dedicated room for it, and they're much less expensive for the size. Most of these are 3D capable now, but the quality is much more important in these in order to get a satisfying 3D performance. (Mitsubishi)

Regular Bluray players do not output the high-frame-rate 3D version of movies to the TV's that are equipped to handle it (high refresh rate + a connection to the stereoscopic wireless glasses). You have to get one specifically designed to be capable of that.

Personally, I'm not blown away by 3D, but it DOES work well if you get great equipment that you tested out thoroughly...it costs a lot to implement 3D in a dramatic enough way to make it worth anything at all. I have a friend with a small flatpanel (50") that does 3D, and it's kind of silly watching a TV in a livingroom simulate 3D. You can't "get into it"...you always feel like you're looking at a little screen across a coffee table.

I upgraded my little theater room's bluray player and projector to a 3D capable projector, it cost around $12k plus a grand for a new bluray player (but I already had a 14' Stewart film-screen made years ago, which saved a lot...expect anywhere from $1k-9k for a screen to match up with a $4k-15k projector), and that's what I would consider near the minimum to get 3D that's actually deep and convincing and exciting without any ghosting or fluttering or fatigue.

They have flatpanel TVs and low-to-medium-end projectors with low-end screens set up at most Best Buy stores. It's something you have to go look at and decide how much it's worth to you, and how much you have to put into it to make it worthwhile. Don't look at specs or what people say is 'good' though...nothing matters except how you like it in person.

You can play it on any TV, except that if you are playing a 3D disk, you must have a 3D TV.