Unfortunately this does not override employment and tax laws - so you still cannot hire someone as an FTE in Paris, from a startup in Berlin for example (without them being a freelancer, or you opening a payroll / tax office in France).

But hopefully we can move towards that - standardised taxation (especially VAT and corporation tax would help massively here), the abolition of notaries, standardised requirements for document certification, and EU-wide digital ID so no need to fly in and sign in person.