Did they announce anywhere what competitions will be offered? Will solo dance now be included at GP events, championships, etc.?
No they have just finalised the regulations around competitions.
The reason for having a set of regulations is to provide a framework for those who want to hold events, including having international competitors, a set of standards that everyone can follow. If you don't the different federations have their own rules which is what has happened to date.
So what that means if I was a solo dancer and wanted to compete in a US or UK event, I would need to follow their rules. It could mean having to learn a new pattern dance from what I am doing here or if there was a RD theme then I might have to do a new program just for that event. We had that issue in Australia around artistic events years ago. Every club did their own thing, including program music timing. Which meant you may have had to totally change your program.
It also opens up the opportunity to have those international events sanctioned by the ISU so that skaters from ISU member countries can compete without having to worry about non-sanctioned events.
So before you can even consider events you need to have the rules in place.
The other thing I am hoping is that the divisions, parameters and elements will all be set up in the software for events. Until this time whenever we have had solo dance competitions we have kind of had to make it up and fit in best you can into the system. Currently the system doesn't allow you to set up an ice dance event for a solo skater, it has to be a couple. If they can sort that out it will make it much easier for those doing all the computer stuff.
Hope that helps
ETA - I am loving this discussion about one of my passion disciplines. Roller sports have been doing it for years. It is time ice got on board.