not that easy to detect as AFAIR they created harddiskfile with encryption for each standalone game. not difficult to embed whdload in it.
whdload unregistered of course, else it's piracy.
anyway, ipad is very bad at emulating computers. you need to remap controls, and joystick on touch screen is terrible.
at least Imame4all proposes wii support through bluetooth.
on the other hand i bought the latest pinball dreams hd for ipad and it's very good (it's not emulation)