I'm not quite sure what you mean by this, but if you mean that they all accept 1080p input, you are (sort of) wrong.
They are all 1080p displays, as are all of the xx627, xx628, xx727, xx827 and xx927 models. Everything you feed them is converted to 1080p60 for display. (The anti-wobulation faction will dispute whether or not they are really 1920x1080 displays.)
They can all accept 1080p24 via the OTA tuner, (presumably) the cable tuner or the 1394 input. I don't think any 1080p24 material is currently being broadcast or sent via cable. If you could find a 1080p24 transport stream, you could pipe it in via the 1394 input.
I don't think that 1080p30 is a valid ATSC format, so I doubt the sets could handle it even if you created such a transport stream and piped in in via 1394.
I know 1080p60 is not a valid ATSC format. See previous comment.
None of the sets will accept 1080p60 via component or HDMI (at least according to the spec sheets).
The xx927 models, and only the xx927 models, have a 1080p60 capable VGA input. This is the only way to get 1080p60 video, that is not MPEG2 encoded, into any of these sets.
The HDMI-2 input can be used for 1280x720p60 input from a PC. It is unclear whether or not it can be used for 1920x1080i input from a PC. As I said in an earlier post, 1080i from a PC via HDMI would seem to be more of an issue with the the display card or driver than the HDMI port, since other CE devices output 1080i via HDMI. The HDMI-2 port is not restricted to a PC, but if you want to hook-up a PC via HDMI, that's the port you are supposed to use.
Edit: I've been informed that 1080p30 is a valid ATSC format, so I would say there is a good chance that if you fed the TV a 1080p30 transport stream, it would be able to display it. (But, where are you going to get one.)