We primarily work on tracking people through a store or any physical space and extract shopping trip information such as areas visited, dwell time, etc. This shopper track information consists of a series of X,Y coordinates which are also used to plot heat maps based on density of points in a given area.
I have been using a workaround due to the lack of cartesian coordinate support in spatial tools - involving converting cartesian values to Lat., Long. by dividing X,Y values by 10,000. This approach works fine for finding spatial matches between points and polygons. However, when using something like a heat map tool which requires Grid Size and Max Distance in Miles/Kilometers, since there is no support for smaller units of distance, you will not be able to generate a heatmap data file.
In addition to adding support for Cartesian coordinates, it would also be helpful to provide an option to load in a Floorplan/Image as Base Map when browsing Spatial tool results.