Thanks for doing this. As you may remember I have a "near" TM900 (the SDT750) and have given a ZS30 to my son when he wanted a "video camera" better than his smart phone. You may also know that I lust after a AX100, or perhaps a GH4.
I didn't watch the BMPCC as I'm not tempted there. I didn't watch the TD10 because, although I have Sony TV glasses, I've not figured out how to use them on YouTubes.
You comparison examples of the TM900, ZS30, GW77 and AX100 show me, once again, that the shooter counts more than the equipment. All three are a pleasure to watch. They remind me that I need to invest time at improving shooting skills more than I need to invest dollars in equipment.
You've reinforced my personal conclusion that I can wait to watch 4K choices to develop.