If you play Virtual Tennis on the dreamcast with a VMU plugged in. you get the characters on the VMU screen as stick figures so you can play without the TV on.
This one is a bit of an stretch. You could sort of play a match with the VMU as the game didn't allow basic stuff like menu navigation through the VMU to properly say you can play the game off TV.
And that's the thing with the VMU, it is so limited in every sense that it ends up been a neat feature more than something that enhances gameplay, even one of the best examples (picking up plays in NFL 2K) you had to be in perfect lighting conditions to see what's going on. The VMU is an equivalent more or less to the Pocketstation, a memory card with a screen more than say... a controller with an screen.
OP you can add Shenmue to the DreamCast list, the VMU displayed small cues when Ryo was learning a new move. Most of the other uses where not actual dual screen gaming but some sort of little program you could download to use it in memory card mode.
Also in regrads of Wii U, you would end up with a list significantly larger. At least most games from Nintendo's side (developed or published) use some type of second screen gaming.
Other amends to your list:
-Human Revolution: This one has plenty uses not mentioned. Hacking mini game, virtualization of panels/buttons and using it as the viewfinder with scoped weapons are ones i remember now.
-Arkham City: Interactive map, touch screen inventory, crime scene scanner, independent gadget view. The independent gadget view in is very impressive for the Wii U since it's actually rendering 2 different view points in a rather visually complex game (as far as Wii U goes).
-Arkham Origins: Crime scene analysis and interactive map to set custom wave points and fast travel.
-Darksiders 2: Interactive inventory.
-Mass Effect 3: Besides the interactive map and 8 shortcut keys, you have squad touch screen controls which ends up been more useful than one might think since this was shoehorned to the game, instead of been made up from the ground up.
-Wii Fit U: Surpried this one isn't mentioned yet since it has very intensive use of second screen gaming. It has multiple view points, VR type functionality and a mirror mode to see if you are making the exercises correctly.
-Wii Party U: This one gets quite insane with dual screen gaming:
https://www.youtube.com/watch?v=tLFAmemK_2I
Sorry for not editing my first post earlier, i had other GC to list. XD