Voice actions and Motorola Connect are the best parts about the Moto X, in my opinion. Like you, I don't have a fancy dash display yet either, but the experience with the Moto X makes me long for the day when one could take over UI / input control automatically without even taking the phone out of my pocket or handling it at all. I will go in for an upgrade in auto at that point!
I didn't see Moto X listed as an initially supported device for the forthcoming Chromecast "screen mirroring" feature either- although maybe I missed it. Hopefully it comes soon. I use the Chromecast constantly and would be all over this.
I had such high hopes for a Google-owned Motorola too.