I agree completely with this. Furthermore, I suspect that the intersection of saxophone players who (1) are willing and able to pay twice as much for the Emeo for its more authentic feel, and (2) don't have access to practice space is pretty small. This is why I worry about the future of the Emeo, even though I really like the concept.
The Synthophone that
@milandro linked to in post #3 was developed around a similar concept, but it was even more expensive (around $3000 in 2004) and remained a pretty niche instrument as a result (I can't find evidence for more than about a dozen Synthophone players).
Incidentally, another significant disadvantage that diminishes the Emeo's suitability for live performance is that, unlike the Synthophone, the YDS-150, or many other EWIs, it provides no onboard method at all for bending pitches (many EWIs have a bite sensor, while the YDS-150 has a thumb-controlled "analog controller").