The main suit he wore throughout the movie was the prototype. It was the one that could break apart, home in and fly (in pieces) to his location, and be controlled remotely.
That doesn't explain why he chose to wear that suit when he expected terrorists at his front door.
The new suits in the big finale were prototypes as well, as he revealed he'd been doing a lot of tinkering when he wasn't sleeping. His main suits were destroyed in the missile attack and were not capable of remote control...which, apparently, was his new toy/tinkering fascination.
None of this is supported by dialogue.
1) There is no indication whatsoever that the new suits were not completed.
2) There is no statement at all as to whether the "main" suits also possessed remote control capability. Remember, his main suits in Iron Man 1 and 2 required a lot more work to "equip" than they did in Avengers, so his main suits obviously go through evolutions. And the main suit at the end of Avengers possessed enough remote control capability to come get him when he was thrown out of a window.