Everybody hated no such thing. You may as well have said that you acknowledge that you don't really have any idea what people who saw 2001 in the theater hated about it.
You have failed to recognize that I was being sarcastic. I should have added the appropriate smiley to indicate that.
Oh, OK.
But, you know,
2001 was exceptional, so it's not like you can easily use it as a film indicative of any kind of trend, especially any kind of bandwagon trend.
Plus, even if it weren't the exception to almost every rule in movie making, it was released over four decades ago, so that doesn't really tell us anything about what today's audiences want in terms of hard science fiction.
Gravity, on the other hand, probably tells us a whole lot more, but I would also respect the opinion that
Gravity isn't science fiction. Although I think
Gravity is science fiction, it's certainly not the same kind of science fiction as
2001, Silent Running, or
Moon, and nor is it in the same category as either
Primer or
Source Code, all five of which at least arguably are examples of hard science fiction films (note that there are two from Duncan Jones).
Source Code proves that (arguably) hard science fiction
can be commercially successful, but that film also is all kinds of exceptional.