The War Chariot really excites me. I hope there's a promotion that allows it to move after its ranged attack. That would be so badass.
I don't think we've seen any such promotion, but that's not to say it doesn't exist of course.
From how it looks to me, the War Chariot is going to be the new Quechua, although that honor may end up going to the Jaguar. Still, be-lining Wheel (lol ) isn't going to be too hard, and having a 5-move resourceless Chariot eek at that early in the game could be devastating. And since they're ranged, they take a little of the oomph out of spearmen, since they can get in their first vollies without reprisal.
Also of note: it looks like the Greeks will be pretty impervious to Egypt, more or less. Having an extra 2 strength on their spearman will help them make quick work of the Chariots unless they manage to swarm all the Hoplites down with sufficient numbers (which will be tough at a 3 strength disadvantage). Plus, unlike normal Horsemen, Companion Cavalry can keep pace with them and have an enormous strength advantage (3 melee 6 ranged vs 14 melee ) and only require one more tech to get.
Plus, Monument Builders isn't going to help much if someone comes by, counters your advantages, and crushes you in the ancient age. So if I were an Egyptian player and ran into an early Alexander, I'd be nervous.
I wonder if that was intentional.