"Question is, can you manage with an old PS4? I couldn't, after long debate."
I was hoping the interface would be different from the standard PS4 dashboard but I can't complain. You will instantly notice a massive improvement. It is so crisp, framerate is smooth!
The most beneficial feature for me is 1TB of space. I had so many games and I was only able to play 2/3rds of them. I doubled my hard-drive storage and now I can play all of my games. Woot!
The PS4 Pro is noticeably bigger than the standard PS4. You may want to measure an area to place it. My old PS4's "area" was too small for my new PS4 Pro, so I had to build a shelf for it instead. It looks better so I'm happy.