That may be true for NASA and maybe the wealthiest and most connected universities and research centers. But that doesn't really help smaller universities or amateur astronomers.
Not to mention that getting a telescope the size of the Keck telescopes into space probably won't be feasible for a long time (although without air pollution you would get similar quality with a slightly smaller telescope). And even ignoring the cost of launch space telescopes are likely more expensive due to needing to deal with the extremities of space like temperature regulation and dealing with cosmic rays (which besides interfering with the computers, also cause noise in the CCD cameras).
Not to mention that getting a telescope the size of the Keck telescopes into space probably won't be feasible for a long time (although without air pollution you would get similar quality with a slightly smaller telescope). And even ignoring the cost of launch space telescopes are likely more expensive due to needing to deal with the extremities of space like temperature regulation and dealing with cosmic rays (which besides interfering with the computers, also cause noise in the CCD cameras).