Mumbai airport upgrades runway for Airbus A380 compliance; will Emirates bring the first scheduled A380 to India?
Between October 2009 and April 2010, passengers and airlines alike, had to put up with runway closures as Mumbai Airport International Ltd. ...

The runway now boasts a smoother surface, new centre line and Barrette approach lights. Six new taxiways including two new rapid exit taxiways have also been constructed to reduce runway occupation time and improve the operational capacity of the runway.

A key point of the secondary runway improvement has been to make it compliant for operations by Code F aircraft such as the Airbus A380 superjumbo. Now MIAL would like to repeat the whole exercise for the main runway 09-27.
The upgrade, subject to approval by Indian regulator the Directorate General of Civil Aviation (DGCA), is planned for commencement around October 2010, and will continue till the middle of the summer schedule i.e. till about June 2011. Shutting down 09-27 is going to have a significant impact on Mumbai's operations. However, we can expect MIAL to keep the runway operational during the peak hours of 06:00~09:00 and from 18:00 onwards.
Two aspects seem to have driven what appears to be a good decision.
Competition

While CSIA is constructing new terminals, the airport simply does not have the space to make a 500,000 m2 integrated terminal, a crucial advantage airlines desire for hub operations. As the map shows, passengers are required to take a tortuous 30 minute ride to transit between the domestic and international terminals, and there is precious little the airport operator can do about it. The national carrier, Air India, currently based at Mumbai and one of CSIA's largest customers, has already announced plans to make Delhi's T3 as its hub to connect the airline's domestic and international network. Kingfisher Airlines too operates more international flights from Delhi than Mumbai. Jet Airways is the only major carrier to be still firmly rooted in Mumbai.

With no integrated terminal, MIAL needs to have some other aces up its sleeve to lure airlines. Without a doubt Mumbai has the traffic potential, but Mumbai is facing a shortage of air-side operational capacity, specifically its two crossing runways.
Runway capacity

Adding to the woes of the airport operators are the regulatory authorities and the airlines.
Thanks to the current rules, the AAI run ATC can only handle about 32~34 movements per runway per hour. Compare this will the 55+ movements per hour achieved regularly at London's Gatwick airport. People in the know, say the authorities are moving much too slow on proposals which leverage on newer technology including performance based navigation, which will permit reduction of aircraft separation which in turn will allow for increased movements per hour thus increasing runway capacity.
With a constraint on the number of flight movements, to increase annual passenger traffic from about 26 million currently to a target 40 million, Mumbai needs airlines to change the aircraft patterns.
Airlines are not helping MIAL's case, choosing to operate multiple narrow body flights on trunk routes, instead of consolidating in to fewer wide body flights. For example, the busiest route in India is between Mumbai and Delhi. Domestic carriers operate no less than 17 flights in each direction, every morning between 06:00 and 09:00, all of them narrow bodies. The three full

With the number of movements limited, sooner or later, airlines are going to have to increase the size of aircraft they operate at Mumbai.
The Airbus A380
The A380, most definitely, has a strong passenger pull factor. The two airports in India capable of generating traffic volumes to justify A380 operations are Mumbai and Delhi. Till the upgrade of runway 14-32, Mumbai was loosing out to Delhi, and now this selling point of Delhi has been nullified.
Mumbai has still not received formal approval by the DGCA to commence A380 operations, but expects to shortly.

All this remains speculative, as the Ministry of Civil Aviation is still not giving permission to any foreign airline to operate the A380 to India. Kingfisher, the only Indian airline to have ordered the super jumbo does not expect its aircraft before 2015~16, and that it much too long for Indians to wait.
One can only hope that the ministry sees common sense, and the citizens of Mumbai can rejoice that they will see an A380 in their city soon.