Chromebook Google Talk Launcher Explained (Kind of)

About a month ago, I wondered aloud what the Google Talk Launch[er] app was or did.  Now, I believe I can confirm that the whole point of the app is to launch another program, now an extension, rather than an app, Google Talk . . .

The app launches the Google Talk extension.

Here's the extension.

Another screenshot I wish I had taken yesterday, at work, is that Google Talk is now a browser extension, which can load at startup (on at least XP), absent even opening Chrome.  The new extension appears to do what the native program does:  Allow users to chat, etc., outside of Gmail.

So far as I can tell, if I have uninstalled the Google Talk extension, or for whatever reason, if it's just missing, the Google Talk Launcher app will send me to the Google Talk extension page in the Chrome Web Store, where I can install it . . .

At the end of the day, I think I've still find the answer to the question, "Why?"  In other words, why have an app where all it does is lead me to the functionality of an extension.  So, while I feel a little more in the know than last month's post, I'm still grasping at straws for the logic behind all this.