Why are some people pointing XRB as one of the big projects in 1 or 2 years? Is it a decentralized exchange, right? Transactions are instantaneous and distribution is fair, right? Is there anything else?

You forgot one important thing, xrb has zero fees.
Zero fees vs. 0.001 satoshi fees (which is worth $ 9)
Why pay a fee transaction when you can use xrb that has no fee
