From the article on TR linked below:
The Tennis Recruiting Network is excited to announce a new series of tournaments called National Showcases. Tournaments in the National Showcase Series are USTA-sanctioned junior tournaments open to players from all sections. These tournaments are designed to give a broad range of players the chance to compete outside of their districts and sections - and these tournaments will count towards Tennis Recruiting rankings.
I agree with what they say about the directors, the ones I know on the list run great events. Looks like more playing opportunities which is great. Nice follow through Dallas and TRN.