The Dalvik virtual machine is being ported to other platforms other than Android/Linux. This makes it trivial for Android apps to run on GNU/Linux and to spread to x86 systems. I love it.
Can you see a smartphone user having GNU/Linux on his desktop/notebook/netbook so that he can use the same app on all of the machines via Dalvik? I can. This is only the second month of 2011 and Android apps will soon be everywhere. ARM will soon be everywhere too making these apps feel at home.