There's no reason to believe that Honeycomb is just for tablets. It's been designed with large screens in mind, but on the developer side of the documentation there's clear indication that it's for all screen sizes:

Android 3.0 brings a new UI designed for tablets and other larger screen devices, but it also is fully compatible with applications developed for earlier versions of the platform, or for smaller screen sizes.

Source: http://developer.android.com/sdk/android-3.0-highlights.html

My emphasis.

There's no reason to believe that Honeycomb is just for tablets. It's been designed with large screens in mind, but on the developer side of the documentation there's clear indication that it's for all screen sizes:

Android 3.0 brings a new UI designed for tablets and other larger screen devices, but it also is fully compatible with applications developed for earlier versions of the platform, or for smaller screen sizes.

Source: http://developer.android.com/sdk/android-3.0-highlights.html#compatibility

My emphasis.