Does no one understand what I'm saying

?
I mean a program that's everything at once! No use for sequencers

....and I know it's just a tool, I've only ever been talking about it as a tool

.
Er, perhaps if I explained it like this:
In some amount of years there will be a notation program, one like Finale or Sibelius, where you notate the music, let's say a piece for string quartet. The computer plays it back and sounds as if it were a real quartet reading it for the first time, albeit a bit more precise (or not, perhaps they'll slightly incorporate human errors). The composer would then change aspects of tempo, articulation, dynamics, expressions, rubato, etc.
Today this is possible with sequencers, yes, but I'm simply talking about a program that combines all of that, samples, sequencing, and notation and that is easy to use, and affordable. In short: the holy grail of notation programs. Er, I should have mentioned that I was talking about notation programs

.
Edit: yeah, I changed the title.....