Here's one article quote to give you an idea...
Construction of the telescope took many years to complete because the proposed technology for the telescope was so advanced. According to Zirker, the expectations of the telescope were very high: “Every aspect of the telescope would push the envelope of technology. The optics would have to be nearly perfect. The pointing accuracy would have to be unprecedented, certainly in space. Satellite control, data handling, electronics, and solid-state detectors – all these would have to be improved or invented to fit the needs of the unique observations (pg. 108)”
We as laymen don't know all the advances building Hubble led to, but it was cutting edge at the time and clearly did push technological advancemebts used in dozens of industries forward that might not have occurred for several more years.
