It really depends on what you want to use it for.
A tablet is more portable than a laptop but is mostly useful for "consumption" activities such as watching movies, viewing pictures, reading email or forums, etc...
A laptop is not quite as portable as a tablet but generally has more storage available and since it has a keyboard, much more capable of "creative" activities such as creating documents and spreadsheets that require substantial data input.
IMO, touch on a laptop is nothing more than a "Gee Whiz!" feature but isn't very practical since you can use the touchpad/mouse and keyboard to do things much faster with less effort.