Here are my thoughts.
PsSuite is just another way to make money off of end users, it should in no way be taken seriously as a way to develop.
The SDK is extremely neutered, it does not allow sound or frame buffering, sound outputs are restricted to OGG/MP3/WAV which will make sound impossible to emulate (if we are just talking about emulators running in this thing)
With this SDK, your code is running within a VM, having no direct access to the hardware, the graphical output and cpu are extremely throttled, making it so any "high performance" app like a NES emulator (or really anything that isn't a lame game that only consists of pasting a bitmap and running a MP3 in the background) run at sub 5fps.
C# is also a bad language to code a emulator in, but my point is that anything made with PsSuite is going to run very poorly. I would wait until an official SDK get's leaked onto the internet