The way I see it, once you rig up a small large sensor camera to actually shoot and handle like a motion picture camera you're around this weight, or heavier and something approaching this form factor. Alexa, RED and the Panavision are bigger and heavier yet but when you see how they're actually used the Black Betty has more in common with them and is more ready to be used like them than any DSLR or FS-style camcorder that needs more mass and additional construction to correct their alien ergonomics.
Most DSLR rigs for handheld are "doing it wrong", placing the camera out, in front of the operator, at a distance from the operator's center of mass and on a pendulum, swinging through space for both broad moves and small corrections. This design works like the better shoulder rigs, placing the camera back on the shoulder with the lens and image plane as close to center mass as possible. It's like an Aaton or compact Arri. Folks aren't shooting actual films with DSLRs and small FS-style camcorders as-is, generally. When they do you can tell and regardless of how lovely the imagery is, as a still, small, lightweight camera movement plays worse than Bourne-style "shaky cam" done with real cinema cameras on hand-held rigs.
Naked camera ergonomics are usually a non-issue when you put them in the context of how the camera ultimately gets used, in a motion picture scenario (why the fuss over the BMCC or DSLR ergonomics has always been silly to me). After all the rigging they tend to look quite similar and you're interfacing with the rig, not so much the camera. This camera just requires less additions to get there and, unlike a DSLR or the BMCC or FS-style camera, you can just pick this one up in base configuration, out-of-the-box and shoot in a traditional, motion picture style that comes through in the footage.
But, yeah, Slumdog had a lot of SI2K footage that looked great and it took home the Oscar for cinematography that year. This is also the same size sensor as used in the Viper which Harris Savides used for Fincher on Zodiac and Fincher used again on Benjamin Button. We'd all rather be using larger than 2/3" sensors but there's no doubt this size is still capable of creating cinematic images.