I agree completely. I don't care who gets the feature set correct first, but right now it looks like Surface Pro is my jam. I need that USB-Serial support. I need that "external monitor that isn't just duplicating my tablet display" support. I need that digitizer pen support, not the usually-pathetic capacitive stylus that forces awkward palm-rejection solutions.
Unfortunately I also want 10 hour battery life but I guess that's the thing to go for now.