There's supposed to be a series being made based on Old Man's War, but I doubt it will have Game of Thrones type production values. I just hope they don't make a complete pigs ear out of it, like they did with The Sword of Truth.
They've been trying to make a film of The Forever War for ages. Ridley Scott waited 25 years for the rights to become available and got them in 2008. In 2015 Warner bros got the rights and it's rumoured that Channing Tatum will be playing the lead role.
I like sci-fi, but I prefer fantasy, stuff like Game of Thrones. There's a lot of bad stuff out there from both genres, but the good stuff is very good.