Mobile devices are an area where everything is a compromise.
A traditional laptop has the most lapability, but honestly anything with a hinge is pretty similar, its just different weight distribution.
In a tablet I prefer a detachable - but with a hinge, and keyboard dock, rather than a kickstand and typecover. Either way, a lighter tablet is preferable IMO for tablet use (drawing, casual browsing), than a 360.
The 360's advantage is really the tent. You can use it as a tablet, in tent, in the kitchen, or on a desk, less actively, for recipes, skyping, instructionals, and it has very similar lapability as a regular clamshell.
I guess you can see it as a spectrum from laptop to tablet, and which is likely to get the most use will determine what FF you might gel with most. If you'd rarely use the device without input, more productivity focused, a laptop or 360 might make the most sense. If you travel a lot (surface pro), or use the device a bit more consumption based, a type cover or detachable with hinge might make more sense.