Well..besides the cone, it looks delicious!!! Those kinds of cones aren't sweet anyway. I'd eat it. It looks like a small serving, it fits in my diet right?
I've actually been to two wedding receptions that had a mashed potato bar. You got your mashed potatoes in a martini glass, then put the toppings on. This kind of seems similar.
Yuck! Kind of reminds me of the Hot Beef Sundae offered at our state fair last year. Hot Beef Sundaes (mashed potatoes topped with beef and gravy, shredded cheese and a cherry tomato). These were actually quite popular. The peas in this one would rule it out for me.