Digital Foundry: "First it wasn't happening at all, but now it's a reality. The Witcher 3's PS4 Pro patch 1.51 landed this week, finally giving us that coveted 4K support, and what CD Project Red describes as a slight performance boost. It's a tiny update in size - just over 100MB - but the impact is huge for PS4 Pro owners. To what extent is 4K delivered with the update, how does it stack up against the base PS4 version, and what do 1080p display users get from the deal? And finally, how does the new code compare with the full fat PC experience?"