The big feature of Phoenix 1.2 is channel presence: https://dockyard.com/blog/2016/03/25/what-makes-phoenix-pres...
Whats coming in elixir 1.3: http://tuvistavie.com/2016/elixir-1-3/
Ecto 2.0: http://blog.plataformatec.com.br/2016/02/ecto-2-0-0-beta-0-i...
Other than that the community is growing at a healthy pace. Hex packages have gone from 1000 to over 2000 in the last 6 months.
Here is a full list of companies using elixir: https://github.com/doomspork/elixir-companies
It's most useful for our services (our consumer facing app is Rails atm) but it's great.