Ok. Cool. But does it simultaneously support a hub like Wink or SmartThings? I'm such a newbie in this, it seems like the beauty of it all is creating triggers across connectivity standards so that different behaviors happen... like all the doors unlock if the fire alarms go off, maybe even add the garage door to that.
Officially, no, it does not work with SmartThings. Unofficially, however, there is a community-created "MyQ Lite" SmartApp available that you can use. The biggest difference between this and the previous support that Chamberlain blocked is that this one doesn't appear to query Chamberlain's servers for the door status; instead, you can use a SmartThings-compatible tilt or (I think) contact/open-close sensor, or if you don't have/want one of those either, you can just create virtual momentary/push buttons that send the open or close commands to the door. That's what I'm doing, but I try to use Chamberlain's app whenever I can--despite the fact that it's awkwardly designed, it works for its purpose and it's nice not to have to dig around for my door in SmartThings since this is the only thing I have configured in their app.
(Speaking of SmartThings, you can already get HomeKit support via HomeBridge and SmartThings or HomeBridge and the myq pacakge, though I'm going through SmartThings since I have no idea if the package that works directly with HomeBridge excessively queries Chamberlain's servers, and I'd rather not get blocked if it does. Oh, and yes, Chamberlain did call their new product "Home Bridge," not to be confused with this.)
Why do you say we need both bridges?
Chamberlain states, "For current MyQ smart phone control users, this simple device adds HomeKit compatibility to your existing MyQ-connected devices. This includes MyQ Garage (1st Generation), any Chamberlain Wi-Fi Garage Door Opener, or any MyQ Enabled Garage Door Openers that use an Internet Gateway." (They've stated this more clearly elsewhere, but I can't find it right now, but they never suggest it's a replacement, as nice as that would be.)
I assume the first "bridge" you're talking about is the Internet Gateway, which you need for Chamberlain openers that don't have built-in WiFi or whatever fancier openers might use that don't need a separate Internet gateway to work with MyQ. (Mine needs the gateway, so I'm not sure what all the other options are.) This just adds HomeKit support to that and doesn't replace your Internet gateway--you'll still need that gateway unless you didn't require a gateway in the first place.
I'm going to pass on this myself.
EDIT: I should clarify that my experience is with Chamberlain, but since they own LiftMaster I assume it will be the same for them. The apps and services are more or less the same with different branding.