Well infact i think all pics and impressions we gained at photokina are more or less useless because:
1.One camera almost always switched into the "debug" mode and i could work with the menu
2. Two of the K-5 just shots 4 raw and 7 JPEGs :S
I think what we are seeing there are some realy bad prototyps/pre-final versions, so i would not count on anything i saw so far, maybe the AF, but i dont assume that it will be slower in final.
And i asked another guy, who denied that tethering shooting will be available, it is not available even for 645D
But maybe (lol) it will be upgrades by firmware.
Ps: JohnBee, maybe you should just wait for the final release ?