Foreign key support is also available whether the application accesses the database via SQL or …
There really shouldn't be any qualifications there and this shouldn't really be news: enforcing relational integrity is a sine qua non for relational databases.
Apart from that, even as someone who likes neither MySQL nor Oracle, it is good to see these improvements. Of course, you can also see the way the path is being paved for users of a reasonable RDBMS to get to high margin products such as Oracle or support contracts.