As linked above, Google tells us to that we can add support for wear in a few lines of code. What can be done, is limited to the buttons that can be added when swiping to the right page.
No other documentation suggest that we can make Android Wear specific apps. It's not possible to add controls and widgets (Editabletext, button, spinner etc.) like it's possible in full android. Now i know that the screen is small, and limitations has to apply..
But the limitations are counted. Imagine receiving an email, swipe right, theres a reply button, click on it, voice will be activated, speak your message, and it will send it. That's pretty cool, but not cool enough..
What if i would like to add someone to cc?, not possible using the sdk, what if i would like to add a different signature? not possible.
The idea is fine, and it's awesome to see something new, i could really see it's potential, but as of right now, i am kinda disappointed.