The FIA has confirmed that the Halo will be introduced to F1 in 2018 following a meeting of the Strategy Group today.
All teams were present, with Renault, STR, Sauber and Haas all represented, although not in a voting capacity.
Several key issues were discussed, and the FIA says that progress was made in various areas, summarised in the statement below:
Frontal cockpit protection
Following the unanimous agreement of the Strategy Group, in July 2016, to introduce additional frontal protection for Formula One and the repeated support from the drivers, the FIA confirms the introduction of the Halo for 2018. With the support of the teams, certain features of its design will be further enhanced.
Having developed and evaluated a large number of devices over the past five years, it had become clear that the Halo presents the best overall safety performance.
2021 Power Unit
An update was given to all attendees regarding the two recent extraordinary meetings held in Paris involving significant representation from the bulk of global motor sport power unit manufacturers.
Further analysis will be completed over the summer which will be reviewed at the next meeting of the Strategy Group in September.
Cost control
A new approach to cost control was presented and received unanimous support. A dedicated Working Group made up of representation from the Commercial Right Holders, the FIA and the teams will be tasked to come up with innovative solutions aimed at ensuring the sport remains sustainable in the coming years.
Improving the show
A number of sporting measures aimed at improving the show were also debated and specific studies will be carried out to assess these.
Adam Cooper's F1 Blog 
I could say ‘unbelievable’ but I know I’d be wrong.
Anything is believable where and when the bunch of fools lead by the chief fool Todt, are concerned.