The "spaceness," of the business needs definition. Maybe you build drones to defend asteroid mining claims and equipment, stealth communications for space prospecting, cryptographically sovereign networks for space supply chains, low gravity weapons and anti-piracy defences, solar sails, a navigation scheme and commercial beacon network, etc.

The nearest term use case for commercial space tech is going to be regulatory arbitrage, so if you can deliver content and secure a physical space jurisdiction for a legal system, it will be the new off shore.