QR was first to Miami last year, and is currently operating 5x/week with a 77L. Will be going 7x/week and 77W shortly. QR is in Oneworld as is their partner American Airlines, who is king at MIA. I think EK wants to sit this one out until the market matures.
Tampa is ~90 miles away from MCO and has some ME/India/asia bound traffic of its own, which will surely find the new EK flight rather convenient. I suspect MCO will be relatively low yielding and high volume. The city of Orlando has put in lots of effort into bringing EK to town. Besides the Euro charters and Virgin which are focused on the leisure traffic on this route, Lufthansa is the only premium carrier flying into MCO offering countless connection opportunities via their Frankfurt hub.
LAX 2x daily is next, and I suspect BOS 2x daily as well.
ORD is upgauged to a 77W from 01MAY15.