Thanks All !

Very interesting profile!

Yes, dual fuel engines is on the rise. The piston engine manufacturers of the world (ie MAN B&W, WärtsiläSulzer, Mitsubishi) are all very succesfull in promoting their engines. Steam turbine plant's are expensive to build and install, and of course when necessary to run on HFO, highly un-economical. Another factor that weigh's in is the limited and decling availability of qualified and certified steam engineers.
I would have loved to see a return of steam turbine propelled vessels...but it's not very likely.

At this moment, according to the registers of IHS Fairplay, about half of the world's LNG carrier fleet is still turbine-powered, but the balance is rapidly shifting towards diesel engines / DF engines as practically all newbuilds are powered as such.

Some years back, "all" large LNG carriers were steam turbine propelled, however in recent years (as pointed out by rd77), more and more large LNG carriers are motor-driven, and they also can use the "boil-off" from the cargo. So steam turbine propelled LNG vessels are in decline. If I could choose, I would prefer the steam turbine type. It's more silent (in the engine room), less vibrations...and I like the steam "idea" :-)

Many modern LNG carriers are steam turbine driven, fuelled by boil-off from the cargo

Contrary to all the recent LNG carriers, this one is a steamship: http://worldmaritimenews.com/archives/203023/misc-berhad-names-new-lng-carrier-seri-camellia/