It would look more like Wasteland 3 or Fallout Tactic, with more combat-related environment destruction and effects. Essentially if you are one those bloke who think all Fallout games are gameplay-wise janky, then Larian basically gonna make it fun and tactical. So, it's pretty much like Fallout Tactic but with actual story and CRPG stuff. It's like a comparison between playing Obsidian's Pillars of Eternity 1 vs Divinity Original Sin if this was 2015.
Though I fear that such game will also being more fantastical than military realism like Fallout New Vegas (post post apocalypse, less emphasize on mutant vs human conflict, more toward politic, state building, etc)