In real life, there's an occurrence called a mirage. There are many misconceptions about mirages, like that they're hallucinations caused by an overheated brain. This isn't the case. Mirages happen when sand, or in some cases, concrete, becomes so hot, that it starts reflecting light. So, when you see a mirage, it isn't your brain tricking you into thinking that there's a big, watery oasis in front of you, it's actually a reflection of the sky. Something like this could happen in Minecraft's deserts, where the sky is reflected by the hot sand. Not only would this be a nice little detail, but this would also look really cool. Something like this would overall, add to the aesthetic part of Minecraft, which, to be honest, is pretty much abysmal. Stuff like this is important. Because, after all, it's the small things that count
This seems like it could take a lot of graphical processing power compared to other Minecraft graphical functions (the simple lighting, the basic shadows, etc.), so it should be disableable through the video settings. Partial Support.
I could see this being added, and I'm not opposed to this in the game. I just don't see the point, it'd take up a lot of graphics power and data for... fake water? Isn't that more of an annoyance than something you'd want? I'd rather the developers spend time on something that affects the game a bit more. If it had to be in the athestical department I would rather something neat like fireflies.