I have been watching a lot of football this weekend (which is true for most weekends in the fall) and a recurring theme needs to be discussed. I think instant replay is important and should stay with football, because the officials make a lot of stupid calls and only replay has preserved the proper outcome of the game (remember the tuck rule game, imagine if justice wasn't served?).
The major gripe I have with instant replay is the fact that you never really know what's real until minutes later. I have seen a lot of exciting games, and sometimes you want to jump up and cheer for an amazing play (like an INT returned for a touchdown). But now I find that I don't really celebrate as much, you feel like you have to be reserved, there is a little bit of you that doesn't want to get emotionally attached to the outcome because it may be overturned by instant replay.
Last but not least, I do NOT believe that officials are sticking to the policy of NOT overturning a call without "indisputable evidence". I think they turn over calls all the time based on what they thick happened versus seeing a clear replay that would be considered "indisputable".