last I heard (though I could be wrong on this), a device must have SSD in order to get the 'ultrabook' moniker. Hybrid is OK, and better than nothing, but not good enough.
And SSD makers: It is OK to not have the 'fastest' drives available. There is a huge market out there for people who just want cheap, reliable, low power storage in the 250-500GB range. For these people speed is a nice perk, but the low .1ms access time, and the low power are way more important. 200MB/s is plenty fast to keep a mobile CPU busy, and anything much faster than that is just wasted power. Lastly, make it reliable so that we do not have to fear digging into the bowels of our mobile devices every year when a drive fails.
Just focus on $/GB, power savings, and reliability and you will get a whole host of buyers who either don't care about the extra speed, or who have hardware (read Atom, Celeron, Pentium, and i3's) that cannot take advantage of that extra speed.