This is what current KDE is missing for me or I just don't know hot to set it up properly. GNOME overview shows: windows, launcher and virtual desktops. Same now goes to Windows 10 april edition. I tried to use Plasma Present Windows but panel, despite of being shown, is unusable. Present windows also doesn't allow to switch virtual desktops, it shows windows from all desktops or current one, but you are not able to see what windows are on what desktop, you've got to use Desktop Grid with separate shortcuts.
It is possible to somehow setup Plasma to mimic gnome overview/windows task switcher?