Deep Sleep Dreams?

Since I've been practicing again, I've been automatically waking up a couple times throughout the night, and I noticed that I always awake up about 3 hours into it, and usually have something stuck in my thoughts.

To the point though. I'm beginning to think that I'm remembering these very vague dreams. There's practically no visuals associated with a normal dream, I get the IDEA of an image, or I can make up one for it, but more or less these dreams seem to be primarily thoughts and ideas, or concepts.

I've yet to remember them in detail, but for example, I played the HELL out of a new game, The Void (awesome, but difficult game), last night, and went to bed after meditating (mind was pretty empty) and woke up with several trains of thought regarding the game, but there wasn't a "dream" per se.

Anyone else have this?