Unique concept but its not new, sometimes people do this with their friends and families. Future betting is definitely a concept in gambling that haven’t been seen that much in gambling platforms, finally this platform made it formal and more organised compare to what we traditionally do.
You got some point but those kind of future bets aren't really that common because even betting something against with your colleagues for a future event wont really be possible anytime.
We do like to know results on spot or lets say a day to few weeks kind of betting which the thing you had said was right! Now that we do have a platform that had been offering this
then its a great option for those who do love to bet on future events.This isn't only on having their own coins to be used but you can make out bets now with using your own BTC.