If you're using a table to track your progress through a task, it would be good to have tickboxes available inside it. For example, I use a table to track progress through bug testing on different browsers across different operating systems, so it would be great if I could tick off each browser on each OS as I go.
| Windows | Mac | |
| Internet Explorer 8 | [] | |
| Internet Explorer 9 | [] | |
| Internet Explorer 10 | [] | |
| Internet Explorer 11 | [] | |
| Chrome | [] | [] |
| Firefox | [] | [] |
| Safari 7 | [] | [] |
I would recommend just using icons:
| Windows | Mac | |
| Internet Explorer 8 | ||
| Internet Explorer 9 | ||
| Internet Explorer 10 | ||
| Internet Explorer 11 |
I think there's a reasonable chance we'll build a dedicated "Manual QA Workflow" / "Runbook" / "Preflight Checklist" application some day, but I'd guess not before 2017 unless things change a lot. If we had this application, you could embed workflows into tasks or other documents using {...} syntax and check them off as you worked through things.
I don't plan to make remarkup writable or turn checkboxes into an inline element.