NEW YORK — More choices in food, activities, itineraries and luxury are some of the trends shaping the cruise industry for 2008. But the big unknown is what will happen with prices.

The Cruise Lines International Association estimates that 12.6 million people cruised worldwide in 2007 on the 24 cruise lines CLIA represents, a 4.6 percent increase over 2006. CLIA believes demand will hold, with a projected 12.8 million passengers for 2008 despite the weakening economy. A recent CLIA survey of 500 travel agents found 90 percent expect 2008 cruise sales to be as good or better than 2007.

But consumers with flexible vacation plans may be in for some deals. "The more uncertainty there is in the marketplace, the more deals there will be later in the year," said Heidi Allison Shane, spokeswoman for CruiseCompete.com. "When the cruise lines go out with high prices and they don't sell out, the bigger the discounts later on." The softest markets, she predicted, will be in mega-ships sailing to the Caribbean and Bermuda.

Carolyn Spencer Brown, editor of CruiseCritic.com, also expects "more competitive prices for sure, because the economy is shaky, but where you'll find the real deals are on the older ships in cruise line fleets, not the newer and bigger models. Per diems on vessels like Cunard's Queen Victoria, Holland America's Eurodam and Celebrity's Solstice will be pricey and demand is strong because all three are new designs."

In addition to the Eurodam and the Solstice, other new big ships launching in 2008 are Royal Caribbean International's Independence of the Seas in May; MSC Cruises' Poesia in April; Carnival Splendor, July; Princess Cruises' Ruby Princess, November, and MSC Cruises' 3,300-passenger Fantasia, December.

Meanwhile Cunard's Queen Elizabeth 2, one of the most famous ships in the world, will be decommissioned and turned into a floating luxury hotel in Dubai.

Here is some other cruising news for this year.

ACTIVITIES: Last year, ships with bowling alleys and mechanical waves for surfing joined vessels with rock-climbing walls and ice-skating rinks. Cunard's Queen Victoria, launched in December 2007, became the first ship to offer fencing lessons at sea.

In December 2008, Celebrity Cruises will launch Celebrity Solstice with a half-acre lawn of real growing grass on the top deck. Guests will be invited to play bocce and croquet, picnic with wine and cheese, or practice golf putts. Also aboard Solstice: glassblowing demonstrations created by New York's Corning Museum of Glass.

In August, Nickelodeon, the children's cable network, offers its first-ever family cruise aboard Royal Caribbean's Freedom of the Seas, with a Western Caribbean itinerary.