Not really. How do you connect the PC and MacBook to the sound bar? If connecting both directly to the sound bar, you'll need to switch those too. So each time you want to switch between PC/MacBook, you'll have to:

1. Switch the video source on the monitor 2. Switch the USB destination on your USB switch 3. Switch audio source on your sound bar

That's why upstream USB-B is so compelling. The monitor acts as a full KVM.