Originally posted by rawr K-5 II DNG's may very well open in existing RAW processors, but the absense of a AA filter in for example the IIs will mean RAW processors will need to be updated and optimised to get the most out of IIs DNG's, since the sensor will be outputting differently to the original K-5.
It should not effect the DNG file. Adobe sets the standard for the DNG and Pentax has to release a camera that exports to this standard. That is the whole purpose of having a standard. Camera manufacturers can't create their own version of it. One advantage you have with a camera that exports DNG is that Pentax includes the instructions in the DNG file for the RAW conversion.
Since the AA filter handles color morie it also makes it harder for the RAW processor to tell the difference between real chroma noise and fine detail. Camera without the AA filter The K-5IIs should show less color noise, better detail, better high ISO.