>I think that by the point in time when we actually achieve life extension technologies, we will have begun to create space habitats
There's absolutely no reason one would necessarily be invented before the other, given we have neither at present.
>Resource depletion can be greatly reduced by changing the way in which we consume
This is true, but I would further add that QoL-independent (even lifestyle-invisible) conservation measures would be far more than sufficient, stuff like electrified transit, geothermal heat pump HVAC, district heating/cooling/steam, onshoring, cradle2cradle product lifecycles, etc. Well short of the radical and largely pointless lifestylism implied by
>not everyone is going to have their own car
This could have a variety of intended meanings, from "people will travel about as much as they currently do (minus routine shopping and work commutes that could be done more efficiently remotely) to all the places they do", to "people will be restrained to narrow routes of mass transit".
>No, not everyone will have an LCD widescreen TV
I have no idea what this is supposed to imply. People living in monastic cells or capsule hotels too restricted to even have a TV, forced to watch on cellphones or in theaters?
Regardless, such matters are only incidentally related to capitalism/socialism/etc.