"Hitting a bit" doesn't count, you'd have to think outside of established verticals - curing cancer would be a major healthcare breakthrough, but it's something like a 3 on that scale, no more.
For that, you'd have to think seriously big - doubling our expected lifespan is important, but it wouldn't bring that much of a change in our planet. A significantly improved homo sapiens species may qualify. Or a way to keep us going on forever - permanently fixing or replacing our bodies. Or a way to "upload" skills to brains, matrix-style.
6 is not making the current condition slightly more bearable - it's transferring us to a radically different state.
For that, you'd have to think seriously big - doubling our expected lifespan is important, but it wouldn't bring that much of a change in our planet. A significantly improved homo sapiens species may qualify. Or a way to keep us going on forever - permanently fixing or replacing our bodies. Or a way to "upload" skills to brains, matrix-style.
6 is not making the current condition slightly more bearable - it's transferring us to a radically different state.