I've looked at this before and I'm skeptical that it's really that awesome.
I know that I shouldn't be judging the book by its cover, but it looks like the company is a apple-fanboy over-funded startup with way too many graphic designers (by looking at the website and the intro video.)
Sure, ultimate portability is great. But if the two target platforms are the Titanium desktop client and the Titanium mobile client, then why is JavaScript used? Let's be honest, JavaScript is a relatively painful language.