IMO when we get to beta we're basically live. Unless something goes horribly wrong with data chains all data will be retained from the beta network. Very sensitive information and interactions will have to wait until after the security audit but there will be a ton of apps showcasing the capability and advantages of a efficient secure decentralised network.
Many of the greatest minds will be COMPELLED to watch and nurture the birth of the new internet. Some heads will literally explode ( aneurysms)
Expect development to speed up significantly after beta launches. This of course relies on great documentation. Big minds need clear data to hit the ground running.
@neo would be the best person for this as he has great high and low level knowledge of the inner working of the system. It would be his greatest contribution yet and will no doubt mean things move at an accelerated development pace when all the engineers, scientists, and researchers jump on the train.