Why is it unrealistic? It could change rapidly if we were serious about climate change.Agree about the tyranny of the car but I can also see why expecting any change as things stand it fairly unrealistic.
Out of interest, you've included 'live in a city' amongst your sustainable lifestyle actions. I'm genuinely interested why this would be included?
Cities are denser so I would assume are more efficient in terms of energy usage and less wasteful. Public transport can serve more people covering less ground, you're closer to work and other activities so it's easier to walk and cycle, less private car usage, waste can be collected doing less miles etc, easier to connect into district heating networks and all that.
I'd assume that dense urban living is better for the environment than suburban sprawl. I'm sure someone will tell me I'm wrong, and that's fine.