Well I found out you can do just that.
You need to be rooted to do this. I am using a fully stock Nexus 7 just adding Root to it. Follow the other guides on how to do this.
Note: NEW info...
Just add the following line to the file "local.prop" located at "/data/local.prop"
If this file is missing, just create a new one. You DO need to be rooted to create or edit this file.
Use ES File Explorer, turn on Root Explorer and Mount File System in the settings.
Navigate to the folder "/data/"
Press Menu, New, File, then name it "local.prop" (without the double quotes).
Add the following line to it in the editor...
If you want the full tablet UI just add the following line also to this file:
Then reboot your device.
Note, this method makes it more difficult on re-installs and OTA upgrades, because typically the build.prop file is upgraded or overwritten each time also. The new method above is retained as long as you do not wipe data.
All you have to do is edit your "build.prop" file located at "/system/build.prop"
I used ES File Explorer to edit this file, just turn on Root Explorer and Mount File System in the settings.
Just add the following line at the end:
That's it! Hope this helps others.