If you already have a vision project, the only reason i see to convert to perspective is to beable to open it on any device on any resolution (even tables/phones).
If you expect a super busy screen designed for 1080 * 1920 desktop to upen smoothly on a small phone.
Then the phone might struggle, it will have less specs than your dedicated computerscreen (i assume). But that should not impact any other user on there big desktop or gateway.
Otherthan that i dont think there should be much difference if you use it on the same hardware.
@nader.chinichian has made some heavy duty perspective screens. maybe this gives you an idea of performance, but it will still depend on the device you run this on.
