But as stated, with current touch sensitivity and visual layout providing positional awareness (e.g. which tab or screen am I on), I can navigate between two full tabs quicker, with better awareness, then swiping up and down and wondering if that particular screen even has more info above or below where I am looking.
Yes, I do use both Tabs and vertical scrolling… and I have actually gotten lost, looking for that particular display or button, within the few tabs that use the vertical method 
EDIT - ahh dyslexia… I thought you meant the up and down scrolling 
The way the current tabs slide, you would only ever see the one you are on and the one in either direction you would be sliding to… I think a complete redesign would be necessary to see, say 4-5 partial views, as you scroll around.
2nd EDIT… and even that way (and the way Android uses) still require that final click to choose… duh… how I missed that?
Anyhow, I like how it currently works. I simply rely on tab names and the ability to quickly click and peek as I go.