Instead of dloading the blockchain maybe we could use an electrum wallet?
And can we expect someone to write a tool to inspect the blockchain and confirm those 'fresh satoshis' exclusive to one chain that someone sent you were actually created after the fork?
You have to have a copy of the blockchains to be able to send coins in the both versions. I'm not sure if Electrum provides such service after the fork.
I think someone will write such tool, those who will be selling exclusive coins, for example.