Specially a lot of time needed if any special important area of print.
The idea is to have a window to compare print simulations (it is using in some photo apps like Photomechanic)And it's a good place to easily tune some settings too.
It's a consept image, just to illustrate.
Another idea (realized in Solidworks) - to add "Play button" to autoplay print and extruder movement for extra check.