In the early days of iOS I worked on a JavaME to C++ source translation tool. No idea if it was a commercial success or not, but it did have customers.

The main desire is for games - ones that just have a canvas or GL - so porting is easier. Also some companies want shared business logic.

It turned out to be a small market though, since iOS and Android took out the market it was easier to write twice than handle the fuss of porting.