I don't have a PS4 pro so no, just 1080p. But I would hope that the upscaling wouldn't be making it look THAT bad considering all the positive talk I've heard. I'm strangely tempted to go with a 1080p TV instead since I have no 4k content if all my 1080p content is going to look blurry.
Edit: most of the 1080p TVs have worse ratings for 480 and 720 content than this TV, so that wouldnt be great with DVDs. I think I just need to mess with the settings, maybe side by side with my previous tv, to get what I like. Going to give it a few days of watching and playing before making a decision.
1080p stuff upscales great on mine. Make sure you're not using 1080i(interlaced), that won't upscale well. Sharpness may help a bit for 1080p content. Just fiddle with your settings, there might be something else that's causing it.