Originally posted by quarc I am hoping for more than basic tethering over the WiFi.
Tethering options do exist for the K-1 - wired and wireless.
There is a USB wired tethering option for the K-1 mentioned in the K-1 launch documentation - the Image Transmitter 2 software tool (which also works on 645Z). There is also a Pentax authored Lightroom tethering plugin for 645Z which is likely to work with the K-1 as well.
---------- Post added 2016-02-20 at 09:41 AM ----------
Originally posted by FantasticMrFox why would people shooting a D750/D810 or 5D Mk III want to switch for it? ...
A good question. But there is always churn in tech.
For example, many a Canon pro has also switched to Nikon, and vice versa, for all sorts of reasons that change quite a lot - sensors, AF, lenses ergonomics, flash systems, etc. Lots of Nikon users went to Canon FF when Nikon was still only able to offer APS-C, I recall.
And if you believe the online media, there has been a flood of Nikon and Canon pros switching to Sony FF mirrorless recently, even though Sony FE has even less of a FF lens lineup and less pro support than Pentax, not to mention even more limited flash options. So these pros are not acting pro?