We already do documents for clients in electronic form where possible. The limitation usually is outside bodies such as banks who insist on 'wet ink' signatures.

It does reduce fussing, for example when signing a multiparty contract, but it doesn't fundamentally change or services.

Standard contracts were always available and any decent lawyer has their own precedents, but part of what the client is paying for is how to use those precedents.

Just like standard open source software is available, but people still pay developers and sys admins...