I don't think the L&B loco will make all that much difference TBH, if anything they've nearly missed the boat. They've been pre-empted by Minitrains, Fourdees and their own US arm of Bachmann. All three of the others have, in my view, made far better choices of loco to model which have much wider appeal for 009 modellers than Bachmann UK as well as being much more affordable in the case of Minitrais and BM USA... I can see why Roco didn't continue, the Fairley, whilst a nice loco, only has limited appeal and I think the L&B 2-6-2s are the same, though their chassis will be of more use than the Fairley's, subject to the motor not being placed somewhere stupid...
Many new people have started modelling in 009 since the release of the Minitrains and BM Sharloey, I can't see the launch of the L&B loco adding greatly to those numbers...