I think it depends on the type of ear your Viera has, the first one would probably be the most awkward. Certain hats could probably pull it off. They could also yeah, just hide them for certain, don't know if I see them doing that though from a creative point. They would lose the ears, and pretty much become Hyur.

At the very least they could start actually adding new headgear that works on viera, most still doesn't.