From @WDWToday (note the lack of an N):
https://twitter.com/WDWToday/status/1128654352766447617
All within the past few hours... are you confused yet?
Edit for those who can't see the full tweets:
1. Lauren, we appreciate your patience. We would recommend checking back early this afternoon for the new options with MagicBands to appear on your My Disney Experience account.
2. Hey there, Jeff! This option for MagicBands will be coming in the next few weeks - be sure to keep an eye out on the App real soon!
3. Hi there! You'll be seeing the option in the upcoming weeks, so be sure to keep your eyes peeled!
4. Amanda, even Guests with current reservations are able to take advantage of this new offer, if you have not yet customized your MagicBands and if you are currently 31+ days out from your stay. Please check your My Disney Experience account for this option later this afternoon.
5. Julie, this option will be available a little bit later today, unfortunately we do not have an exact time at this moment. We would recommend checking back early this afternoon. Your patience is truly appreciated.
6. You will be able to select an upgraded MagicBand, please check back on your My Disney Experience account a little bit later today for this option to be available.