It does not necessarily mean the console is too weak. This has bothered me for some time now when people overreact to this. "Technically impossible" could mean the engine the game runs on only works on other architectures. It could mean they wrote the code in a way that makes it "technically impossible" to port the game to the Wii U without putting lots of resources into it (they'd have to rewrite half the game, basically).
For instance: We use Ionic as a framework to develop our apps. Ionic-built apps only work on iOS and Android devices. So for us, it is "technically impossible" to port our apps to Windows Phone (without re-writing them completely). That doesn't mean Windows Phones are weaker than Android phones or iPhones. It just means it is technically impossible for us to port our apps in their current state.







