Been wondering the same thing. If the whole benefit of this newer compound category came down to appetite suppression alone, why would this one specifically generate so much excitement? A different existing medication already suppresses appetite significantly, so that alone wouldn't be a reason to switch.
From what's been read though, this category may do more than just curb hunger. The signaling pathway involved interacts with central pathways tied to a hormone called leptin, and animal research suggests it might partially restore how responsive the brain is to that hormone.
People dealing with typical excess weight usually have plenty of that hormone circulating, since fat tissue produces it. The issue seems to be reduced brain sensitivity to what that hormone communicates about the body's long-run energy reserves.
In theory, that means this category might influence how the body actually defends its weight overall, not just hunger levels moment to moment. Loosely tied to the idea of a body weight set point, though that theory itself remains debated.
Way too soon to say this specific compound actually resets anyone's baseline, or that its human results trace back in any real way to better hormone sensitivity. Still, that angle is exactly what keeps this genuinely interesting.