Several people have pointed out that carrying a saucepan and burner around may not be practical and therefore this might even make sense. Someone else asked if this isn't an old idea - after all boiled eggs have been around for a while in supermarkets.
If it's just that, then okay, I get it and that's cool. You're out and about, forgot to make yourself a pack lunch so you pop into Asda for a snack.
But what I got from this was they boil YOUR eggs for you. In other words you take the eggs you bought previously to the store and they return them boiled. Is it just me or does that not sound like something that would take longer than the 4 minutes (plus time to bring the water to a boil) you need to hard boil egg the normal way?
How to (soft) boil an egg perfectly every time
Okay if you really don't know how to do this.. I'll be facetious and tell you.
1/You boil the water first. That's right, you bring the water to a boil with NO eggs in it.
2/Throw in about a teaspoon of salt - it helps prevent the shell from cracking and bursting before you pull out the egg.
3/Once you can see some vigorous bubbling and steaming, your water is boiling. Look at your watch or a clock. Write down the time if you're a pot head and have no short term memory.
4/Put your egg(s) into the water.
5/Wait precisely 3 minutes. Not longer, not less, 3 minutes.
6/Pull out the egg and put it in an egg cup.
7/Take off the top 1/4 of the egg.
8/Put your spoon into the egg.
9/Notice that your egg has been perfectly soft boiled.
10/Wait.. I wanted a hard boiled egg, I'm totally screwed, what can I do?!? Nothing, because you've already opened your egg and unless you like some sort of fucked up poached egg deal with no yoke you'll just have to eat it.
Some people do indeed prefer their eggs HARD boiled. This is particularly tricky as it take an entire extra minute to go from soft boiled to hard boiled. That's 4 minutes.. or less time than it takes most people to deliver two eggs to Asda and wait for them to have your eggs returned hard boiled.