Both movies came out around the same time and I think they have a fair amount in common. Both movies have a fair amount of the “Can they do it?” tension and detail the events behind a major trend.
I think I preferred BlackBerry over Tetris. It seemed more grounded in a way where as I felt Tetris depicted Tetris, the game, as bigger than the second coming of Jesus and sliced bread combined. I felt like it made for a more enjoyable and relatable story.
For a Canadian film it has a surprising amount of big names such as Glenn Howerton (Dennis from It’s Always Sunny in Philadelphia) and Jay Baruchel (from Tropic Thunder and Knocked Up). Here is a Wired review and here is the IMDb page if you are interested.
Movies about Palm and the Balmer Era at Microsoft would be good.
The YouTube channel Company Man is basically a fount of docu/mockumentary ideas.