Of course, personally the real draw of this game is the chance to discover exotic planets and go where no one has gone before. Wouldn't that be something?
It's like going to the Moon. Getting there is awesome and it's quite an achievement. But once you're up there and you notice that there's really nothing for you to do other than running around, you'll get bored very, very quickly.
I think most developers understand that there's an issue with this whole thing, cause creating procedurally generated environments is nothing new - the problem has always been how to actually fit any 'design' in there that keeps players entertained. And of that, we've seen close to nothing yet. Games that are just procedurally generated that don't have any real game design / interaction tend to just grow old very, very quickly (See Proteus). The promise is great, the reality isn't.
Building a big area that you just walk around in is just not fun. On top of that, the planets we've seen so far all look completely similar, except for some of the colors. Yes, it'd be great if all the planets would look different and if there'd be new things to interact with, but what we've seen this year again has basically been the exact same demo we've seen over the last 2 years and if a developer doesn't show any gameplay, there's just a very, very good chance that there isn't any. Yes, you can tell yourself that Murray wants to keep it all mysterious and surprise everyone, but as a skeptic dev who spends almost every hour of the day on design, I just have to be critical over 'Oh, it's all procedurally generated and it'll be fun' - History told us otherwise, so it remains to be seen.
The biggest issue I see so far is that they've always just shown the same things during the demos. I don't even doubt that it should be fairly easy to put simple, yet addictive gameplay hooks in there that'd keep you going. But they haven't shown anything, so obviously people remain skeptical.