Not played it myself, and probably won't, because I'm not really interested in the setting (would prefer if they'd made the next GTA instead).
But I did watch someone streaming it for a bit yesterday, and I must say the mud deformation and physics looked absolutely gorgeous. The streamer was fist fighting with some guy in the mud and it was pouring with rain. Looked great, visually-speaking.
Yep, me too.
I gotta say, though...those visuals surprised the hell out of me. I knew they'd be good but DAMN it's the best looking open world to date, I think - better than Horizon maybe.
"The Path of Excess leads to the tower of Wisdom."