This is just all sorts of misinterpreted information. Ebert didn't try to disprove the inherent technical flaws of 3D. Walter Murch did, then Ebert reposted the letter and tweeted it. The slate article doesn't disprove anything Murch said, it just disagreed with him on a subjective level.
Argument 1: "3D is unnatural, gimmicky, and makes people's heads hurt."
Argument 2: "No, it doesn't."
Ebert's Position: "I don't like having to put the goggles on over my glasses, wah. And it makes the screen darker."
My Position: I see a movie in a theater about once or twice a year. I haven't seen a 3D one yet, and don't really intend to because I'm afraid of germs, spending money, and social interaction of any kind. Also, every movie screen in my area looks murky, misframed, washed out, water damaged, and unfocused enough already. I don't need 3D to contribute to that problem. My home theater always looks and sounds better.
Argument 1: "3D is unnatural, gimmicky, and makes people's heads hurt."
Argument 2: "No, it doesn't."
Ebert's Position: "I don't like having to put the goggles on over my glasses, wah. And it makes the screen darker."
My Position: I see a movie in a theater about once or twice a year. I haven't seen a 3D one yet, and don't really intend to because I'm afraid of germs, spending money, and social interaction of any kind. Also, every movie screen in my area looks murky, misframed, washed out, water damaged, and unfocused enough already. I don't need 3D to contribute to that problem. My home theater always looks and sounds better.