While #7 is appealing because it reminds me of Bladerunner... I actually think #5 makes the strongest connection to a wide audience. (Unfortunately, not everyone is a Bladerunner fan.)
In all seriousness, I like the global perspective of #5, skimming across the surface of Earth, showing how universal Steemit is. And the Steemit logo rising across the horizon shows strong branding.
Oh no, I'm looking forward to the sequel! And it's a great observation by the way. Thanks man!