In terms of your comment that it requires a little bit more energy for continued display, this isn't really the full story. The article states that this small update is only required once every 15 minutes, but my guess is the vast majority of E-Ink applications have use cases where the screen is updated more frequently anyway (e.g. for e-readers you are rarely going to spend more than 15 mins on a page).

It is relevant for use cases like persistent artwork or ambient always-on displays, but I think for most of the common e-paper use cases it's a moot point.