Correct - Migros bought a stake in LeShop a couple of years ago. Maybe all of it, I don't recall... got to speak to the CEO during a school project at the HSG last year, they've got a good setup going. You'll note, though, that LeShop offers more than just Migros goods!
As for the novelty of Ikea, that always cracks me up. Buying the world's cheapest furniture in one of hte world's most expensive countries....