The latest Android-x86 Project release takes us one step closer to using the Android OS on a desktop or laptop computer. However, the project suffers from stability and reliability issues.
If you want one Linux-based OS to run on all of your devices, Android-x86 could become a viable alternative. The major advantage to running Android on all of your devices would be keeping all of your settings, apps and Google services on an equal footing. That is not happening yet, however.