Just throwing this out there... but let's say Shenmue 3 is a resounding success... do you think there could be a chance that Shenmue 4.. or even 5... utilizes Sony's impending VR headset technology?
I'd like to imagine a virtual reality Shenmue where you truly see the world through Ryo's eyes. Imagine walking with Shenhua, and moving your head around to see the beautiful scenery.
Imagine reaching out your hand to manipulate a capsule toy machine or actually performing the karate moves while training.
Perhaps this technology wouldn't be at that level for games for another 25 years... but I do think Shenmue in particular would benefit from a full on virtual reality interface.