My personal favorite outcome of this would be a joint public and corporate funded leap in open source development. This would do much for the budget, privacy and probably also security of businesses and private users. A good example where this principle is already in use is the Matrix protocol.
How does FOSS make gdpr compliance easier?
The main point I am trying to make, though, is that investing in software that can be used and improved by anyone is (IMO) the appropriate allocation of tax money. Right now, the money is used on licenses (and, of course, support). What if it was used on development (and support) and the byproduct is a software that ideally can be used by anyone who paid for it, too?
The GDPR situation poses an opportunity to make that switch.