1. Whole applet thing is going to be replace in the future.

That's the goal. But as long as some people use the applet version, there are no reason that I remove it, and I'll just advertise more the JavaScript version than the Java version.

2. Currently you are targeting on completing Html5 3D view export from sh3d file

This feature is already completed.

3. Html5 2D canvas also will available in near future.

That's what I hope, but I don't know how near it will be. Please, don't request any delay. This can be in weeks as well as in years.