(My nominations and my choice in bold. Just for fun. I haven’t seen yet Hunger Games: Catching Fire, After Earth, Riddick, Her and maybe I missed some titles. )
Best actor in a supporting role: Sharlto Copley (Elysium), Russell Crowe (Man of Steel), Benedict Cumberbatch (Star Trek into Darkness), Philip Seymour Hoffman (Hunger Games II), Ben Kingsley (Iron Man III), Simon Pegg (Stark Trek Into Darkness)
Best actress in a supporting role: Rebecca Hall (Iron Man 3), Andrea Riseborough (Oblivion) , Zoe Saldana (Star Trek Into Darkness), Antje Traue (Faora, Man of Steel)
Best actor: Robert Downey Jr. (Iron Man III), Idris Elba (Pacific Rim), Joaquin Phoenix (Her).
Best actress: Sandra Bullock (Gravity), Jennifer Lawrence (Hunger Games II), Rinko Kikuchi (Pacific Rim)
Best cybernetical enhancement: Iron Man armors (Iron Man III), the Jaegers (Pacific Rim), the exoskeleton (Elysium)
Best setting design: Krypton (Man of Steel), the Tokyo Jaegers base (Pacific Rim), Tower 49 (Oblivion)
Best robot or A.I.: Operating system (Her), Consciousness of Jor-El (Man of Steel), the drones (Oblivion), security and service bots (Elysium)
Most desolated future Earth (a big theme in 2013): After Earth, Elysium, Hunger Games II, Oblivion,
Best sci-fi film: If I try to be objective, I would say Gravity (overall quality of acting and effects), but Pacific Rim is probably my personal favorite, I should watch all these films a second time to be sure.
You can write comments in the answers. Do you have different choices ? Do you want to give an award in a new category ?