Yes, the only difference between today's event and one that might be held next year is that Trump's podium today also has a matching Mexican seal on it while next year it will have the POTUS seal. Throughout the conference it was obvious who was the senior partner on the stage, despite Trump's current status as a "private citizen".
This was a coup de théatre that puts Hillary's playbook into disarray. Trump is now poised to leverage this from here through at least the first debate. You can almost here the lines now: "When I spoke with the Mexican president just last month we agreed that...", etc.
From here on out it will appear that Hillary is challenging an incumbent seeking re-election. Her campaign must be reeling, even if she hasn't quite figured out what just happened.
Bingo. Trump is roaming around in the Clinton campaign playbook creating havoc.