Computed fields do not trigger digest cycle

Newly computed values are not reflected in the scope when they are updated. Try modifying the inputs on the Plunkr. The computed "fullName" is always a change behind. (I'm on Chrome 41 OSX 10.10)

http://plnkr.co/edit/SHJA4RPdn03mRbvGFwcy?p=preview

I expected this to just work, but I guess the behavior makes sense since it's hard for js-data to figure out which scopes depend on the computed value to trigger $digest cycles for. Is there a better way to do this? I was hoping I could replace some angular filters.

Btw, loving this library a lot.