Well, you could also 'just' put an iPad in the middle of the table for public game state (like turn, flop river in Poker), and everyone has their smartphone for private game state (like your hand in Poker) and you can play most boardgames quite nicely.
Instead of the iPad in the middle you could use a TV screen, too, but then you can't directly interact with that via touch screen.
One card pp might be adequate for the hold cards. It's easy enough to represent two cards on one little screen. Feels tidier to me.
For holdem, you ideally need a plinth that can "deal" cards upside down. Maybe it's more general to have a plinth that can update cards in either orientation.
Congrants jonahss on your art. Thanks for sharing.
so a 6 person game, 12 of these + 5 ~ 17 of these ~ $450 ~ about the cost of real nice chips and cards...