BoboTheMighty
SasqWatch
In last few years, one of the most interesting systems was from Two Worlds II...you had magical cards to combine each with it's own effects to combine to create spells... rough around the edges, but had potential.
I don't really think it has anything to do with the move to 3D worlds. I think it's simply that the mainstream market isn't perceived as viable for the relatively high-brow tactical party-based RPG subgenre.
We're seeing a return to it because of the crowdfunding explosion more than anything else.
But all the new party based games coming out are all isometric games are they not?
Magic in books is something fantastic, mysterious, powerful and at times pretty random.
Magic in games needs to be a little more pressed in a restricted rule/resource system, otherwise it would be pretty hard to balance mage combat/skills.