This is news in the category “Just because it can be done“.
Wired: Running a web server on an Apple Newton: not bad for last century hardware. But how about a Java enterprise application server on a smartphone? Well, it’s possible – you just have tot install Ubuntu Touch first, says Mike Croft in “A Smartphone as a JEE Server: Glassfish 4 on Ubuntu Touch” (via DZone).
Just remember: you’ll need a lot of Nexus smartphones in a cluster to support some serious application traffic!