Two predictions from me:
Garmin, because they have such a foothold on the GPS market it's hard to see them losing it. Though considering no one would have predicted their rise, the fall might be just as sudden.
Garmin have done very well by expanding the market for sport and fitness related GPS devices, but I think that's ultimately going to shrivel in a similar way to the car Sat-Nav market (ie. the desired features will be easily implemented on the portable computing device
[1] that everyone's already got). I expect that, like TomTom, they'll revert to their core business of making professional GPS products.
Rohloff, a premium product that I think will always have a market.
Seems likely. Of course, it may get borged by some multinational and production moved to the far east, causing Rohloff affectionados to pine for the quality of the older models.
I'd say Brompton were definite future classic material, but that's pre-1978, and a healthy chunk of their existing market seems to depend on the image of classic Britishness.
ICE trikes might be a contender. They're quietly and without a fuss churning out quality products that there's a decently growing demand for, and not afraid to innovate. At the same time, it's niche enough that they may avoid becoming a victim of their own success.
[1] Phone, watch, tricorder, glasses, brain implant, whatever.