In addition to the thermal/memory performance improvement, they also upgraded the bluetooth a bit which may be useful for docked mode. They added an extra dedicated bluetooth antenna on the top of the device to work better in docked mode and with multiple controllers. You can also now wake the device from a bluetooth controller instead of having to push the power button. It now supports the aptX low latency codec as well, although last time I went shopping for that 5 years ago, device support was pretty rare.
In addition to the thermal/memory performance improvement, they also upgraded the bluetooth a bit which may be useful for docked mode. They added an extra dedicated bluetooth antenna on the top of the device to work better in docked mode and with multiple controllers. You can also now wake the device from a bluetooth controller instead of having to push the power button. It now supports the aptX low latency codec as well, although last time I went shopping for that 5 years ago, device support was pretty rare.