Anybody ever see an open wheel race car with an enclosed cockpit in the upper echelons of racing ? I doubt it.
That would be a completely different class of racecars, not GP, not F1.
Indy cars (very similar) have yet to incorporate the halo, none for '18, and no talk of it,,,,,,,,,, yet. But they have a higher air intake pod behind the driver, which helps for roll over protection, but doesn't really add anything for protecting the driver from being hit by car parts, which is being touted as the main reason for the halos.
But I agree it is a very different look, but it doesn't make me "sick".
Last year's Indy race had a very scary accident where a halo could have been a welcomed addition, the driver was very lucky that his head didn't hit the top of the wall.