Say what you want about these oft-ridiculed monstrosities, but they are out there and people actually (1) buy them and (2) [gasp] eat them.
So, the question becomes ... why aren't they seen on menus, esp. as dessert items?
Fruitcake a la mode?
Fruitcake with your espresso (or latte or whatever caffeinated drink you prefer)?
Fruitcake pudding (in the vein of "bread pudding")?
Just thinking out loud ...