Huh. I'm as skeptical as all those riders they encountered on the Death Ride.
If it really is so much better - the same claims that are made by recumbent
freaks riders (!) - then it's an interesting question as to why these things don't catch on. Recumbents have been around for decades, but probably don't number more than, what, 1% of the riding population? Granted, this thing is just starting out, but I'll be curious to see if they take off at all. One problem I see is how to attach anything to the bike. Sure, it's great for fitness when it's just you, but on the bike that I commute on, I drop two small panniers with about 20 pounds of crap in them on the bike. Locks, tools, clothing, and anything else I need to carry to work. I don't really see a good space to do that on this thing, but maybe that's just because there aren't any peripheral makers for it yet. I hate wearing a backpack when I ride - I seriously threw out my back once, and now I just stick with panniers.
The standing thing doesn't bother me too much. For short hills, we stand up a lot anyway. I do think they make too much of the "aches and pains" from cycling, though. Sure, my coccyx is a bit tender right now, but I also haven't ridden more than a 100 miles this year. Once you start cycling regularly, most of that goes away, if you have any sort of decently-fitted bike (which of course is the problem for novice riders).
I'm trying to picture flying down a hill at 40 mph on this, standing up. That just strikes me as terrifying, in the abstract. It looks almost like a Harley chopper stance; I've never understood how those things are comfortable, when I see biker dudes with their arms way up above their heads.
(Edit: I should probably 'fess up and point out that I've never ridden an elliptical in a gym. I don't do gyms.)
They're actually having a live demo this Sunday nearby. I might have to see if I can go check it out. Maybe I'll ride my bike up there.