I think a lot of people will miss what this really means for the guy who wants to daily drive a Jeep...
For example, If I charge the battery overnight at home, I get 25 of my 38 mile commute for almost free. Because my work offers free charging for Electric Vehicles, which the Wrangler would be/is, I get another 25 miles free so of my 76+ mile daily commute I am only buying gas for 26 miles of it. If my commute is under 25 miles, I could go all electric...
I currently have a commuter car to do this drive, this new 4xE opens the door to being able to driving what I want vs. what I need to.
I don't doubt the 50 mpg either... I currently run a Ford Fusion plug in hybrid that gets 800 miles a tank of gas how I am currently using it and which works out to almost 70 mpg.
The electric option isn't there for wheeling per se but more for daily/commuter use. The cool part is that it is a plug in hybrid so when you want to run on just gas and use your rotopack for extra range you can.
Oh from a marketing stand point, the Grand Wagoneer is simply Jeeps answer to Tahoe, Navigator, Escalade, etc...