I know that numerous Motif sounds are now available with Cubase 6, which is nice/handy, albeit “lite” versions, but, I’d like to put forth the idea that Yamaha, with it’s considerable history/experience and resources, start making dedicated VST instruments.
The first on my wish list would be a top-of-the-line Motif style Grand Piano. I really love the clarity,tone and low end balls of that piano sound…I know, this would probably compete with Steinberg’s own “The Grand 3,” but, I see it as an alternate sound…not been a big fan of The Grand or it’s successors. The sustain portion has always rung a touch too false for me.
And, while I’m on the topic, why not start producing synths/workstations on PCIe cards ? Some of us don’t need the keyboard and other bulky hardware anymore, but, I for one, would love to be able to access high quality sounds instantly, with next to zero latency, rather than always having to load huge sample sets that may consume too many CPU cycles forcing higher buffer settings/longer latency in large projects.
These PCIe versions could come with a standard set with the options for daughter cards/chips with specialty sound sets ala the old JV1080 with it’s Expansion cards. 
No other DAW manufacturer that I know of utilizes the power within GPU’s yet.