After a fashion, I think part of the success of Minecraft is because it ties deeply into the open world, build and explore feelings that Myst hit upon. Indeed, the audience of players is similar in how it ranges from young kids to the oldest of us. On the UK Minecraft server I frequent, the average age is late 20s up. Some of us are in their 40's and 50's even.
I seriously doubt that. Myst was entirely unlike Minecraft - it contains a finite amount of content to explore, and your interactions with that content are limited entirely to viewing and exploring what the developers put there. You can't create anything, and you can't go outside the boundaries drawn by the game.
Minecraft's lack of borders is certainly part of why it has managed to outsell the entire Myst series (though it's less impressive when you consider how much larger the market is these days, and how much easier it is to get to 12 million sales). But the atmosphere of mostly-peaceful exploration of a different world is something that Mincraft and Myst undoubtedly share, and something that hasn't been recreated by very many games in between. Bethesda's RPGs do an okay job of allowing exploration, but they come with a heavy emphasis on combat and a very in-your-face plot line that completely changes the mood of the exploration. Minecraft and Myst just drop you into a new world without any preface, challenge, or goal.
I definitely think there's room for Myst today.