The newly announced Sony a6400 is what the a6300 should have been almost two years ago. It is still missing a key feature that was introduced with the a6500 that of IBIS or Sensor Stabilization which works with any lens added to the system. However, if you remove the IBIS fail from the equation this is a killer camera for just $900 which in this day and age of $1000+ cellphones, it is quite a bargain for the body only.
We were amazed by the 120fps full HD quality of other sony alpha cameras like the a9 and the a7 III which fully track subjects while recording in super slow motion which really makes the feature stand out compared to other cameras which force you to go manual while on that mode. The codec quality has also been bumped in this camera for 120p to 100Mbps from 60Mbps on earlier cameras like the a6300 which should preserve more detail while sacrificing little in image crispness.