VPW includes a built-in video and audio Softphone, so you don’t need a deskphone at all (or a VPN phone or a SIP phone).
As long as you have a compatible browser (Chrome for now for video calls), there is no other software to install or update, unlike ViewPoint Desktop (VPD).
VPW runs on Mac, Windows, and Linux, while VPD only runs on Windows.
VPW is always up-to-date. No software to keep updated.