I've been doing a little experiment with my Jelly Bean Droid RAZR HD. It has HDMI output and switches to fulltime landscape mode when HDMI is cconnected. I have it attached to a 19" TV. Of course, it also supports Bluetooth.
So, I paired my Apple Wireless Keyboard to it, along with my Apple Magic Mouse. Both work fine. The volume keys on the keyboard work too and even the Expose key works, which on Android brings up a screen with icons of recently used apps with tab selection support. The finger gestures on the mouse also work, including up/down scrolling, and sideways swipes on the home screen to choose different pages of the home screen. Furthermore, when I have the keyboard paired, the built-in virtual keyboard does not load up, keeping the screen uncluttered. The only thing that does show up (as set currently) is the auto word suggestion bar. The only real annoyance is when I click on a text entry box, it zooms it slightly, which is useful on a phone, but not a 19" monitor. Sometimes the autoformatting in Dolphin does slightly weird things but that could be corrected.
I've been using Dolphin Browser with the full-screen add-on and what that does is remove the big address bar and the notification bar, so I get the full 720 pixel height of this screen. It doesn't remove the soft keys so I'm missing a bit of the width for the back key, home button, and recent apps button, as well as the menu icon, but that's OK as currently implemented since the back key takes me to the previous page and pressing the menu button once brings up the address bar allowing me to enter a new URL. As soon as finish entering the new URL, the address bar disappears.
What does this all mean? It means that even today one could use Android 4.1 as a desktop surfing replacement for basic users, albeit with some minor glitches. Plus there is the rich Google Play Store full of apps for Android, most of which work fine in this mode.
It wouldn't take much at all to get Android transformed into a full-on non-touchscreen desktop or laptop OS, without having to sacrifice the app store, or mobile functionality. I'd say Android is almost there already. In reality it'd be some minor bug fixes, and some alterations of font sizes and rotation and zoom behaviour which could be done in months... and it would make Chrome OS irrelevant.
P.S. This message was typed on my RAZR HD using my wireless keyboard and mouse.