From your posts & my memory, TRON is basically being used as an embedded OS. Thus, its competitors would really be WindRiver (the dominant RTOS company), RT Linux variants (Blue Cat, MonteVista, Lineo, etc), QNX, eCos, and, on the margins (embedded but not real time), Linux, Symbian (for cell phones), and WinCE.

I don't think it will gain much marketshare in the US, especially with Linux improving, but I'll make sure I check for it when I visit the Embedded System Conference West.

For a lot of devices, Linux is still way overkill, especially if you do not need a GUI or TCP/IP stack. For example, if you're trying to do a system with no MMU, 5K RAM, and 64K flash, Linux won't quite fit.

Tony