Cheating in online games is big business and is accessible to more than the technically inclined through purchase. There's no reason to think the same won't happen for tests that have actual monetary value.
I think much like with a basic Turing machine definition compute is possible on a variety of substrates that some kind of intelligence can be created with a whole class of implementations, transformers included. Indeed the video and image input of LLMs is one of the most exiting use cases.
Absolutely. The physical world is the input that creates the feedback loop for learning.
I would propose a definition of AGI. "A model capable of effecting the physical world through speech or physical action in a manner indistinguishable from a human."
LLMs solve for the next word. Human intelligence solves for survival with many types of input, visual, audio etc. You can't create an AGI if you don't solve for the problems that created human GI.
The wiimotes are just bluetooth and the tracking is 5 LEDs. I've used candles instead of the sensor bar before. You can buy a "dolphin bar" for $20 and use your wiimotes on the PC. It works great. I dumped my wii games and haven't touched the console in years.