Not only this, you'll miss the touch and the tone from the "famous drummer",
I agree again, it won't be able to replace a physical hit from a stick on a drumkit.
But, that said, if it is recorded by a drummer, it will likely be very close to how he originally played it. Much closer than say if the drummer gave the performance again.
and the sound of the very expensive drumset he played, and the sound of that very expensive mics and pres set, not to mention the mic placement and the room, and the reverb...
You could use this device on that same drumkit, in that same room, with those same mics, etc. That is the beauty of something like this.
It doesn't seem to me a way to have the great drummer with you at your local pub, if not for the rhythmic (notation) aspect of it
You must try recording on an electronic drumkit sometime, viabcroce. You would be amazed by how much better it is than triggering loops or programming. I have a kit at home and a recorded performance sounds much more convincing due to the human element.