You will have the opportunity to trade STEEM on your preferred exchange, and maybe get some nice trading pairs like USD/STEEM or EUR/STEEM. There's not a lot of benefits to being listed on many or all of them really, except for user preference. But being accepted on big exchanges with a lot of volume tends to also increase the value of the cryptos there, so more listing could certainly lead to a higher price.
Few good things will happen to us :
For instance we will be at MOON if that happens
Like BTC, we will have pair up tokens and it will bring a lot of focus to our Steem thus we will see a lot of usage in our token which shall allow us to see a price surge of steem which is bound to happen.
A lot of new investment will go on and as new money will get in we will get a lot of attention to Steem Blockchain as well. Which will make the communities action rise and we will see a surge of adoption that we have been talking about all the time.
SO overall good news will be coming all along if t ever takes place.