I don't think they invented any of the things they do, but they made them much more prevalent.

Renting commercial space and brining it up to spec to be usable is a lot of work and overhead that a small or startup business very much should probably be allocating elsewhere (building out conference rooms, wiring for power and networking, placing WiFi, entry security, decoration, etc. etc. etc.) It all ends up being extremely time consuming and taking twice as long as best estimates generally disrupting everything, not to mention the years long leases, enormous deposits, contract negotiations and other upfront costs. It is at least somewhat revolutionary to have turn-key office space become prevalent.