JVM Not Just for Java
I'm a Mac user and developer. I build apps for Mac and iPhone in Objective-C, but I also build backends for corporate sites in languages that run on the JVM. Not having Java on the Mac would make my life as a developer very difficult. It's the Java work that pays the bills and allows me to develop for the Mac/iPhone so I guess the latter would have to drop if I couldn't use a Mac.
Also, don't forget that the Java Virtual Machine is not just Java. There are a whole load of better languages that require a JVM to run: Groovy, Scala, JRuby, Clojure and many others. Dumping Java from the Mac excludes way more developers than those stuck in boring old Javaland!
As a developer I but top end Mac kit. I can't help feeling that Apple are shooting themselves in the foot with this one. Let's hope Oracle step up to the plate.