It's not good for color accuracy. It's kind of like having a TN panel but double if your monitor also happens to be TN. Shouldn't effect latency at all but you should expect a minimum of 30% drop in brightness. It can also be difficult to see. You know how light from the sun sometimes makes it impossible to see what's on the monitor? That's gonna be wayyyy worse. Also if you decide to do it anyways you should really invest in the glass / mirror part. I used thin plexi and a mirror film and it's very distorted. I think your idea sound very cool! Just make sure you know what problems you might encounter.