For a moment I thought you were talking about DataGridXL, but your comment is on the canvas grid?
I actually made quite an effort to make DGXL work on touch screens. It's not there yet. It's basically read-only on touch for now, but you should have no problem selecting cells and copying values.
For me, DGXL on iOS lets me select and scroll beautifully, but I cannot actually edit (I guess because the cells aren’t text fields, the device doesn’t know to open the on screen keyboard). So it works very well for output but doesn’t work for input.
You're right, the editor does not open on touch screens in this version.
It's still possible to enable editing on touch screen, but it asks for a custom <input> element on the page that interacts with the grid, using methods setCellValues & getCellValues. It's certainly possible. Will put up a demo for it when I find the time.