I think stock and bonds to the blockchain is a no brainer. They can already be purchased/traded online, so moving them to the blockchain should be easy. For things like art and land that are physical, I can see why it can be difficult or unnecessary for some people.

You mentioned tokenizing art and breaking it down to 100 million. I wonder if that will work, since there is only 1 art piece, and people would want to have the physical art for themselves. If 100 million people each bought one, would the 99 million just have a digital receipt to signify their ownership and one person having the actual art? Or is it going to be a digital form of the art. Then we're going back to useless NFT territory where people are saying they can just copy/paste/download the image themselves.