I'd say it is, then again I'm "supposed" to be the world's most dedicated "plant".
Not that Wall-E is a shambles, being a fairly triumphant film all by itself. I think UP just goes a bit further down the same path of making something that's a solid story first, and an animated film only second. I read an article the other day that says that the guy who directed UP was in fact the initial director for Wall-E, but he handed it over to the guy who finished that film (and got his name on it) because he was spending most of his time on UP (these Pixar films take about 5 or 6 years to make, apparently, so they may be making several of them all at the same time).
Cost-wise the 3D version ran $3 US more than the non-3D version for tickets where I saw the film. No idea if that pattern will hold world-wide (of if it even holRAB elsewhere in the US). The 3D glasses ARE reusable, but only if the theater neglects to collect them back, and only if you see another 3D movie using the same technology. This one is called "Real D", at least according to the plastic wrapper they're packed in, and use a form of polarization instead of those annoying paper "Red/Blue" or "Amber/Blue" ones.
Google/Wikipedia says Real D's been around for 4 years and in a whole laundry list of previous films -
http://en.wikipedia.org/wiki/Real_D#Films_featured_using_RealD
If you hear the phrase "Disney Digital 3-D" instead, apparently that's just Disney's moniker for their own sub-branding of "Real D". Since a lot of the films on that list seem to be non-Disney, they hardly seem to control the technology.