flights to/from DFW are already suspended and not part of their reduced schedule. i can't imagine that route would reopen suddenly after aug 6, but it's possible i guess. there are a number of flights from MIA, so my advice would be to get to MIA and fly that way instead of direct.
well united officially cancelled my ticket on the 25th (no surprise really). i guess they updated their system to reflect what was approved.
in any case, the earliest i could get rebooked now is aug 14. there wasn't anything else available to choose from when i called.
I've passed through with 2 computers before. I got dinged trying to bring through 3 once. even opened and without boxes. your iPad and MacBook is probably OK but if you try to bring more be careful. the phone in your pocket won't matter