I was also going to mention the A7x's. 24mp is absolutely fine for me, image quality is great and it's more than big enough for any print I would ever want to do. Until then, I don't see a need for more.
For what it's worth, I previously owned a Pentax K1 (36mp). It was nice to have that additional crop-ability but it was entirely unnecessary for every scenario I would use my photographs (currently).
many forums and the "pros" once were certain that the star eater issue makes the Sony A7 Series unusable for astrophotography but I always had good results with my Sony A7rII. So I recently went ahead and had it astromodified. The thick IR-Block Filterglas was replaced with a thin Baader substitute that lets IR Light down to the h-alpha line and the sII line through to the sensor with high transmission. The results can be seen in detail on my google drive link here:
Honestly, why do you need more MP? 24 MP is plenty for any kind of print you may ever want to make if you factor in optimal viewing angle. All these bells and whistles you speak of result in a vastly better image than just boosting the MP-count would (better AF and subject tracking, better low light ISO-performance, etc). Higher MP is just marketing crap unless you plan to heavily crop or print billboard size and stand with your nose against the canvas.
For good reason the A7x you refer to
I have an a6000 with the sigma 30/2.8 prime lens. I am shooting video with face detection. I see that the face detection will create a gray box around the subject, but does that mean that the camera is focusing on that, or that it just detects a face? If i have press the shutter the box will turn green, but my worry is that when pressing the shutter down when shooting video it will create camera shake.
So is there a way to see what the camera is autofocusing on and tracking while