I have about 40GB stored on my OneDrive (mostly music, pics and Kinect studio files). Interestingly I ripped all of my old CDs and stored them in OneDrive as a backup - hoping I could play them through Media Player. That didn't pan out - however, I heard rumors that MS was going to allow Xbox Music play from a OneDrive account which would be awesome. I did notice that when I logged into Xbox Music on my Xbox One it had a button for something about Instructions for playing from OneDrive, but then took me into some Microsoft IT account login page :) Looks like things may be getting close.
Question of the week you should ask - what would people be willing to pay for the Work and Play bundle? $200 seems a bit steep, I might go for $149ish - especially if it included Windows as well. ($9/month for Xbox Music Pass seems outrageous to me, given all the free music services out there, which unfortunately makes the Xbox Music service on my phone, desktop, xbox one, and web useless - unless they do actually start allowing you to play music stored on your OneDrive)