Expand the scope

[Tom Crick]

I think the fact that the authors focus on tabletop systems is really limiting the scope of this paper and I have no doubt that whatever they are doing is applicable to a large variety of systems (e.g. smart watch, mobile devices, wearable computer etc.). They say it in the conclusion but I would suggest removing the focus on tabletops from the introduction and title and rather be more generalist straight from the beginning.

[JAMcNaughton]

Expanding focus will be part of further research as discussed in the conclusion.