I gave given this more thought.
This system would let the spoiled rich kid whose parents take him to the GF concierge every year virtual walk ons to all the popular rides that he has probably been on many times before, but the poor kid whose parents saved up forever for their once in a lifetime trip to WDW staying at Pop Century the longest waits for those same rides cause they didn't have the large amount of cash like the first family did. Extreme example, but I'm making a point here.

So not all kids would get the same experience at the parks, but their parents paid the same in price for admission - just some kids got the fancier resort with more souvenirs to take back home. OK...
One thing to think about, too is if you pay for your park tickets on your room charge how many fastpasses will you get from that? I think many of us DVCers buy APs before our trip? So we wouldn't get that large amount of money charged to our room right off the bat like others.
We went to Six Flags last summer and they have a similar system, called Q-Bot or something like that? You have to pay for it. It was something ridiculous like $100 for a family of 4 for one day! I thought it was so tacky and rude, that stupid park had already gotten like $200 from our family for about 4 hours worth of time before we left. (Not impressed with the Six Flags...) On the same lines, $100 for a family of 4 at WDW for a WEEK would seem more fair to everyone and I'd be willing to buy.
Now, I must admit I'm a hypocrite here cause I'm not gonna turn away fastpasses if they give them to us DVCers.
Just making some points...