It would be great if you could put images to cells using html. E.g.: <img src="..."> would result in an image in the cell.
I agree with allowing templates like Kendo Grid. That would take care of some of the other suggestions (Include Images, Include buttons, Include checkboxes).
Yes, and cell or column template should be provided like kendo grid. Template for inserting button in all the cells or image are general scenarios we required.
Yes! With most other HTML grids, you can supply an HTML template for a cell... Lets add this to the Spreadsheet control...
spreadsheet cell renders each cell as text node. It should have an option to render it as html node based on some configuration.