While higher GPU power can be used upscaling graphics and applying better FX and AA on the Pro model, games will have to keep their CPU and RAM requirements within base NS specs. In the past even Ninty itself released just a small bunch of titles that required DSi HW or WM Plus and couldn't run on original DS or older Wii with the original controller and without the new one (even if users in Wii case could buy a new controller or a dongle for the old one to make their old Wii 100% compatible). Mid-life upgrades just have two choices, splitting the user base or making a limited use of their improved specs.
This means that most probably NS Pro won't solve the problem of the most power-hungry multiplats unable to run on NS.







