Bigger Hubble ......not needed these days...well not quite right there is the James WEB telescope...working in differing wavelengths that we cannot receive on earth.
Adaptive optics telescopes have become the new grail...where a sodium LASER is fired into the upper atmosphere and this is used as a reference collimation star and
adaptive optics correct a 2ndry deformable mirror for
atmospheric conditions.
This has made
major improvements these days and giving outstanding imaging .....although ground based does have it's own drawbacks.