nyogisanz
I hope they could also integrate that chord track and intelligent composing assistance ala Cubase 7. As you know, especially to people like me who has the passion for writing songs yet does not have the "proper" music education, these features would greatly help us.
Nyo..., have you looked at plugins like this:
http://www.7aliens.com/w2-harmonizer-vst ? Or this:
http://www.synleor.com/improvisator.html ? Or this:
http://www.cognitone.com/products/nav/intro/page.stml There are others, they all have demos, many are VSTs that plug into Sonar. Some like the Cognitone are standalone (import the results in Sonar, easy as a, well, cakewalk), but WAY more powerful (and fun) than Cubase (or Sonar) are ever likely to be. Check their sound file examples
http://www.cognitone.com/products/mps/examples.stml There _are_ other options for the capabilities you (I think) want, and better ones, than what Cubase has or Sonar "may have" someday.That's what third-parties are all about. And they're available NOW!
Related story, I was looking for live looping capabilities, tried all sorts of jerry-rigging with Sonar (kids, don't try this at home) and finally resigned myself to bellying up and purchasing Ableton Live. Fortunately, I first found Mobius which, for me, is tons the better looping solution (one of those it's-doing-what-I-want-and-I-haven't-even-scratched-the-surface types of products and it's free (though I would have paid anyway, because solutions are worth it). Point being, Cubase ain't the only way to skin a cat, there are things to at least try, inside, or side-by-side, Sonar.
Best of luck on your song writing adventures.