Maybe you more tech savy guys will know this.

Other than the obvious benefit of larger HDD sizes how will/does this thing work.

Right now I have 2 PS4s: (1) A PS4 Pro on my OLED and (2) my launch PS4 upstairs in my media room

Can I just transfer all my games to the external HDD and then move the drive back and forth to whichever PS4 I'm playing. I.e. if I have some time during the day while the wife is at work I can play on the OLED and at night I can just move the external drive upstairs and pick up where I left off?

I read on the PS blog that only apps and games would be saved on the external HDD but isn't there a way to use PS+ cloud saves for the actual game/file saves that would make it easy to use more than one PS4?