It saddens me to say that Aperture's innovations are only skin deep. If it could deliver on the promise of being both fast and produce flawless results, it would be the dream package. At this point it is an expensive and questionable alternative to Camera Raw, a free extension to Photoshop, and Adobe's Bridge which can batch produce better quality images in arguably less time. For US$500 (Photoshop itself retails for US$750), there is no excuse not to be aware of professional needs like a high-quality sharpen tool, DNG exporting or more basic things like curves, a sampler tool for RGB pixel readings, or retention of EXIF data on output.
An interesting review with some very unsettling (for me at least) observations. I'm thinking I might sit out this cycle of Aperture and wait for 1.5 (or possibly 2.0) before taking a plunge.