I will add that it's installable by developers (or people with some technical background) who are fairly familiar with the flashing process and with the guts of Mer and Sailfish.

Your normal user out there won't be able to install it like they upgrade their Android version. If Jolla wants the "normal end user to install Sailfish on their Android devices", they'll have to make it available via a store or something, and I have no clue what they'll do with the user's data and so forth.
If Jolla actually means that you can buy a device that normally runs Android with Sailfish installed, that's a whole different story.

Of course that for some people in TMO your statement is more than accurate, just bear in mind that the message that Jolla sent wasn't for TMO in particular ;-)