I' m going to use this gif to describe why I'm personally excited for the game and why I kind of hate the "it looks like every other open world game" as it undersells a lot of the little details that separate, in my mind, this game from a lot of the open world games out there.
To begin with the the Thunderjaw itself is amazing creation not just because of all the moving parts, the slick art style and the cool idea. Look at how it actually bumps into the tree at first and reacts like a creature would to this. In most games, especially open world games this isn't even a consideration. Most NPC's will just walk into and around something or worse get stuck. The Thunderjaw hits the tree's, recoils and shifts its body before ramming it and properly toppling it. Not only that but many of the objects in the environment are destructible and interactive from the tree's to buildings and so forth.
The little visual cues given off by the Thunderjaw as to what its going to do. Right before the Thunderjaw charges through the tree toppling it over its eyes do a distinct large red lens flare "flash" to signal its about to start charging, as well as its entire body language showing its tensing for the charge. Just a lot of cues as to when the Thunderjaw is going to attack on top of audio cues as well. This is the kind of stuff not enough developers focus when doing combat, the tell's are as important as the reactions of your character to them. No Death Claw in Fall Out was nearly this interesting to fight, intimidating to cross paths with, and open to be taken down in so many ways.
This is one gif and its so full of interesting little details and combined with the already slick looking combat, the tight controls, smart gameplay ideas like generating a quest for a rare crafting material instead of hunting for a rare loot drop. I think the fact that GG isn't a well known open world game creator is quite possibly the games biggest strength as their fresh outlook and skills in action gameplay might be the best thing to happen to open world games in a long time. Now in all the RPG elements, the platforming, the dungeons, the crafting and all the other gameplay systems that seem to interact in a ton of different ways and you could have something truly special even if some of the cut scene animation isn't up to Naughty Dogs level or anything like that.