Sure I leave my browser running all the time. FF runs from a few minutes after I log in until Windows gets flaky and slow weeks-to-months later. Browser tabs are a great to-do list, with context and history. Why would I ever close my browser? 5 seconds to load it up (or 3 minutes, if it's restoring my ~100 tabs) is a waste of time, and RAM is cheap.
The people who can't tell the difference because of biological reasons is quite small. The others don't have a 1080p-capable display, aren't watching 1080p content, or have had it maliciously compressed somewhere along the way.
Further, it's not just resolution. Sure, resolution is easy to sell, but can we maybe have >24 or 30 fps? Please? Pretty please? I don't need to see every pore on an actor's face until the camera moves and then be teleported back to the 1950s with choppy pans and zooms.
Anyone can make an omelet with eggs. The trick is to make one with none.