I definitely don't like the idea of having everything plugged into the internet. In this case, a key benefit to the store would be knowing someone is monitoring 24/7. If a unit shows signs of failing, the company can get a repair person dispatched before any employee at the store would even know what was going on. If a unit fails and the store itself is responsible for monitoring and scheduling maintenance, that alone could lead to food spoilage or extra labor to move all the impacted items to another freezer unit.
Again - I'm not a fan of the IoT... but from a business perspective something like this makes sense. Selling food is not a high profit margin business... just losing a bit can wipe out a day's profit on a smaller store.