It would be sweet, but it's quit expensive. I bought my 1.5 year old son with a Panasonic LV50 with free style LCD and then attach it to the back of the front seat so he can watch cartoons in my M6. And I don't have to worry about people breaking into my M6 either since it's portable.
It's under $800 compares to $2000 if you have it built into the seat and I can take it to another car if it's necessary. But I guess it's more for a family man like me.