The easiest way to get similar functionality in Windows now might be to use an AutoIT app (source available) called, not surprisingly, Hot Corners. Indeed, a really useful bug made the hot corners specified for Plus! screensavers a global setting that applied to non-Plus! screensavers as well! Actually, Windows screensavers did have this feature (at least those included as part of the Plus! pack, which old-timers should remember):
