Firstly, it's not by any means certain that it will launch. Google are saying Fuschia is an experimental operating system. However, everyone is expecting a launch and there's some surprise that it hasn't already happened. If it does launch, it will have to prove that ordinary consumers really can manage it easily on whatever device they are holding.
the only person who has publicly done any kind of evaluation of Fuschia is Ron Amadeo of Ars Technica. If you can find an article that quotes him, he managed to get the early Fuchsia code up and running on an ordinary console.