One note is that I emailed the local Anthem dealer to see if they knew anything about new models being released.
When I emailed them back to say I would be patient and wait for the new models, they replied with a couple of details:
"The new one will also include eArc which will be a huge upgrade over Arc. It will allow you to plug 8K sources into the new TV’s or use the TV as a source. You will then get the proper audio format back to the receiver/processor instead of 2 channel PCM."