The Senate passed their tax bill early this morning by a 51-49 vote.
"Vice President Mike Pence broke a tie in favor of a proposal from Sen. Ted Cruz (R., Texas) to allow the use of 529 savings accounts to pay for elementary and secondary school costs, including private-school tuition."
This would put 529s on par with Coverdell, but with much higher contribution limits.
http://www.savingforcollege.com/questions-answers/article.php?article_id=145