Sony's PJ line has long been favored for their unique built-in projector, but video quality is usually pretty good too. The Sony PJ670 re-wraps a lot of the features of the PJ540, but does give the camcorder a big boost in quality with a higher bit rate.
Where the previous model shot at a 28 Mbps rate, the Sony PJ670 shoots an excellent 50 Mbps. The increase means bigger file sizes, and more data translates into better video. That footage is shot with a 1/5.8" sensor that's backlit to help with low lighting conditions. A 60 fps frame rate keeps motion smooth, and add in a 30x zoom and the PJ670 isn't a bad option for shooting sports either.
The PJ670 also features Sony's latest image stabilization system, Balanced Optical SteadyShot (BOSS). Unlike just Optical SteadyShot, BOSS stabilizes both the lens and sensor where OSS stabilizes just the sensor. The additional stabilization will help produce even smoother footage.
With the larger file sizes, the 32 GB of built-in memory will come in handy. The projector keeps the same specs as the previous model, with a 25 lumen brightness and the capability of projecting videos up to 100' in size.
We've enjoyed Sony's PJ models in the past, we don't expect any less from the PJ670. If budget is a big consideration, the PJ670 appears to be quite similar to the older PJ540, with the exception of the higher bit rate.