Do I need a physical box anymore?

Today I returned two boxes that I had in my bedrooms that I never used because I have the Xfinity streaming beta app which works awesome . My question is can I get rid of my main one in my living room as well it’s the XG1v4-A my living room tv also has the app As well . I’m guessing my recorded shows are saved on Comcast servers because I unplugged the box and that function still worked on the app . So I’m Guessing the hard drive inside of the box is disabled so can I return this box as well? I noticed when i did activate the apps it said I would see on my bill as I’m using customer owned equipment if do use it as my main box so technically I can then right?