Are you an Eames-obsessed parent? You might want to check out the Priam from Cybex. It doesn't just look like it could be parked outside a case study house; it embodies the "details make the design" philosophy.
You've got your 3- functionality, going from pram and carrycot to carseat to front- or back-facing stroller. It folds with one hand, into a freestanding spacesaver or completely, to fit in a trunk. Priam's seat is aligned to standard dining table height, so it can be used as a high chair. There are even ski attachments for snow.