Programs written in an ideal programming language should run anywhere

Programs written in an ideal programming language should run anywhere

While I expect that programs will be constructed and debugged from inside a virtual world, they could perhaps run as well in browsers, mobile devices, and other platforms. ToonTalk programs can be automatically converted to Java and run as applets in browsers. Perhaps something similar could be done to run on other platforms as well. It probably isn't practical to expect the programming environment to run on these more limited devices or contexts but when an application can be isolated from the environment it should be possible to generate a stand-alone version with much lower run-time requirements.