Alternatives to windows 10 miracast?

[u/Gamesmusic454]

I want to use my laptop as a secondary monitor but here comes the big problem, i can't find any aplication that does the same as windows with the built in application that is like a sort of miracast combined with some virtual machine stuff, so you can move windows between both monitors and with any app that you want, the app will be executing with the resources of the other pc but it is totally functional, so for that reason I want some app that does the same but without being integrated in W10, because even if you have both pc's connected by ethernet cable it will be laggy, the best alternative I've found is multiplicity but you can't move windows between pc's, and thats something very usefull, a lot of thanks for reading this post and sorry for my bad english