Do you really think FD were that stupid to do that? They'd get ripped apart both by the playerbase and the press, especially in the face of No Man's Sky (regardless of that game's unrealistic scale, the fact they do seamless transitions at all means that everyone, myself included, will expect and accept no less in ED).
Stupid? Not at all. Just typical. Hype is part and parcel of the video game industry these days. Practically every single game developer, publisher, and studio overpromises and underdelivers. Head back over the DDF archive and see what was discussed there, then compare it to what we've actually got. The gaming press never take publishers to task due to hyping, with the exception of a handful of indie journalists like Jim Sterling.
We've been talking about SCBs today. Please watch this video, and look at the original vision for shields...
[video=youtube;aL2_oa_5D8A]https://www.youtube.com/watch?v=aL2_oa_5D8A[/video]
...then compare it to the cookie cutter shield system, complete with SCB spam and boosters, we actually use two years later.
Planetary landings is vastly more ambitious in scope than even this very modest, yet undelivered, proposal.
NOTE: I am not accusing FDev or anyone of abjectly lying to us. I sincerely believe that
they believe they can make these things a reality, but as things go forward and as they bump up against limitations in the engine, in technology, in processing power, or even in basic development ability and time constraints things get simplified and discarded.