The problem seems to be the game budgets. It seems that games for the PS3 and 360 tend to have huge budgets to help development etc....but the number of bought units doesn't equate to development costs.
IMHO, the DS is the most profitable platform for any game developer at the moment. Development costs are low and userbase is huge. The only problem with developers making games for the Wii and DS is that they are technically restricted because of the hardware, so some developers want to push to be making the bigger more graphically enhanced and more technically superior games...but they are not getting good enough sales.
I think we'll see more multi-platform games being released similar to Spiderman 3 etc.
Prediction (June 12th 2017)
Permanent pricedrop for both PS4 Slim and PS4 Pro in October.
PS4 Slim $249 (October 2017)
PS4 Pro $349 (October 2017)
