Yeah, exactly - that’s the key difference. In his setup everything moves as one reference frame, so the motion cues feel natural. At home it’s always a bit of a trick on the senses since the chair moves but the world around it doesn’t.
Good question. For me, I’d love to see better depth in systems and flight modeling across the board, especially for GA aircraft, rather than just more visual polish. Hardware like the GI 275 you mentioned would definitely be a big step toward more flexible, realistic setups too.