I think I will continue to work in 2D anyway. I was introduced to Silicon Graphics Open GL and found that the learning curve was like for a shrink being a brain surgeon...
In my experience, most serious clients still want to see 2D drawings as they are used to. I can imagine that new buyers, unfamiliar to yachts might be impressed by 3D renderings which of course is easier to understand.
But for me, the major benefit of 3D is in the manufacturing process, where you can get robots doing the job in detail down to the antislip pattern on deck...
And luckily, there are good guys out there that can help with this job
/Lars