A non event would mean the stock isn't affect by the split and I know of no companies whose stock isn't affected by a split. It's always an event.
It is a boon for options MMs I assume since the number of contracts will skyrocket since it will be easier to buy options on a $300 stock vs. $900. Look at GOOGL or AMZN its very cheap to buy calls/puts on them now for the retail trader.