Don't really know how new but it's not in the Chip Guide. Feel free to post the image if anyone wants to do that.

For the first time ever, I was printed out a ticket when I cashed out at a table. One table gave me a black chip and gave me option of a "voucher" instead. I didn't know what that meant but when I cashed out at the next table, he didn't give me the option and just printed out a $200 ticket. I'm not sure if you can buy in at the table with it or not but I didn't like it! Hopefully it's not just a way of phasing out chips at the tables