I'm not convinced that exploring on foot is going to be all that interesting. If it was then surely it would have got more attention in the advertising trailers ?
To date, if you didn't know it was Elite, most of the trailers would make you think it was an entirely separate space shooter game - and not a particularly good one either.
Historically exploration in Elite has been mainly geographic, basically along the lines of - 'Oh look - a new planet' ; and not much interaction with the local environment when you get there - even in a SRV.
There are supposed to be major changes to the graphics - so exploration will probably be 'Oh look- a new planet with a tenuous atmosphere' etc. and not much else.
If the devs would invest as much time in making the game interesting, as they do in finding different ways to slaughter everything in sight, then, I'm sure, a lot of us would be eternally grateful.