This is what I've got now as well.
It works well, the best thing is that it's got ethernet so I can watch You Tube on the big screen.
The VIERA CAST system is pretty sluggish if you compare it to a laptop or even Android,
the main reason being you have to interact with a remote control rather than a keyboard or touch screen.
I haven't looked or heard of replacement controls.
You can view a few different/new formats of saved files compared to the DMR-EH68 but you still can't freely copy media you may have torrented onto the diskdrive of the DMR-BW880