There are companies like RealT that tokenize real estate. I actually built a project to do just that but it was abandoned by the owner and I didn't get paid, whole thing, but there are companies doing it. They just have to do it in certain ways that they can work around the SEC, like not selling to US investors outside of accredited investors, run KYC, etc.
It will come. I have heard Fink talk about tokenizing assets and stocks and such, so we will see. I know I am looking into a token or NFT of some sort to sell tokenized shares of mining rigs and payout a profit share to investors. That whole thing is going to be a slower process. You see how long it took for Bitcoin to get adopted, and it's whole narrative had to change to 'digital gold' for that to happen.