The cost differential between ePaper displays and the comparatively cheap jumbo tablets will offset higher current consumption for a good long while:
https://www.aliexpress.us/item/3256808694032679.html
Best Buy sells 24" touchscreen displays for $339 right now. So you can spend $3000 on a display that sips current or spend 10% of that and you get $2700 to pay towards the higher electric costs.
I call that an interesting trade-off. YMMV