Collectible card games, trading card games, whatever you want to call them.
I’ve been playing some Hearthstone recently (played it when it was still in beta, then dropped it around the time of release for some reason), and the whole concept of an all-digital card game is rather fascinating. With physical cards there’s a rather high barrier of entry for new players, because they need to spend money (or get gifted) a bunch of cards before they can even start playing and deck building for themselves. Digital cards can easily be given away for free, so everyone can start with a start-pack to kick off their experience.
What’s more, you don’t need to be physically with some people to play! Online versus is a great thing. It can match you against players of similar skill to play against, and if the player base is somewhat sizable, that’s an effectively infinite amount of matches for you to play.
While there’s more benefits to the digital factor than I described above, there’s also the downside of losing that tabletop feel. Playing against some random person on the internet will never beat the feeling of hanging with friends and pitting your equally crazy decks against each other. And yes, digital cards will never feel as precious as real physical ones.
Luckily Hearthstone tackled some of these things nicely by working with what they had available: visuals and sounds. And it’s worked out pretty nicely.