DUBAI (Reuters) - Planemaker Boeing Co. (BA.N: Quote, Profile, Research) revealed its first leasing company buyers of the hot-selling 787 mid-sized aircraft on Monday, announcing previously unidentified deals worth up to $4.6 billion at list prices. Deals announced at the Dubai Air Show which opened on Sunday underscore the rebound in demand for new planes being seen at both Boeing and rival Airbus (EAD.PA: Quote, Profile, Research) this year. They are close to doubling the orders they booked in 2004, each helped by demand for more fuel-efficient models due to high oil prices. Leasing firm ILFC (AIG.N: Quote, Profile, Research)...