Doubt it. The multimedia/bluetooth is incredibly good already IMHO, even comparing to current Chrysler UConnect and Cadillac systems. It's just a bit clunky learning it, but very stable and fast to connect for my iPhone. I think the other models which are getting CarPlay are much newer infrastructure. Since it's all CANBUS, I wouldn't be surprised if the relatively ancient bones of the 200 are not getting an incremental upgrade like CarPlay. I am still in love with my 2014, and hope the 300 doesn't disappoint. I'm sure it will be great, but I'm thinking it's going to be a much lighter duty vehicle that the 200.
My personal belief is that the 200 will go down as the most desirable Land Cruiser because it's going to have old school heavy duty construction blended with modern comforts and IFS. I think the future of the vehicle is going to be redirected to a slightly lighter duty base now that there are many off-the-shelf counterparts to be used by the traditional "commercial LC customers" as a result of the strengthened and more particularly specialized military industrial complex. The 300 will probably begin debuting controversial features such as small displacement turbo engines, hybridized systems, aluminum and composite components, etc. I guess time will tell.