Yes, you are right!
Byteball has such a huge potential. We can brainstorm ideas about what you can do with a "blockchain" (yeah its really a DAG) that can store arbitrary data.
It is like the HDD equivalent of Ethereum. Maybe it can be combined with Ethereum? The "world computer" needs memory after all. Ethereum smart contracts reading and writing data from Byteball?
Byteball has its own smart contracts, but better with declarative style and not-fully turing complete (but maybe by accident as many other things).
You can make an uncensorable twitter, with built-in pay-for-each-byte-of-your message.