I'm not sure where I stand on this. On the one hand, this could potentially kill any kind of flow or watch-ability football games have; on the other hand, there's plenty of downtime between plays as it is, so why not utilize that time to make the right call? I understand that it's tougher to change a rule once it's been put in place, but for now, I'm in the wait-and-see camp.
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.