The only problem with 3D is that I would have to buy a TV, and I usually don't do that, being fine with modern internet.
So I'm not buying a TV, let alone a pricey 3D one, but I'm considering upgrading the PC display whenever possible/somewhat affordable.
Smartphones are practical if you can afford and if you actually have some use (professional)
HD vids are awesome, we all agree on that
3D might be awesome as well, but right now it's too expensive