Specs don't make a great device--I'm hooked on iPhone's app ecosystem and UI--but I do like the specs
I hope battery life is good: thin, slider, and big battery don't go together.
On-screen keys are a pain, they are slow and suck more attention to position them when doing other things.
Plastic keys are more intuitive and faster when typing, they react faster too.
It is a fact that people text message when driving and doing so with an on-screen keyboard will take the rest of your concentration rather than plastic keys. Or when you are talking to some one.
Actually, it seems to be a matter of what you're used to: people with habits of using tiny physical keys don't like touchscreen keys (at first). People who don't have (or have gotten past) those habits like the touchscreen just fine, and often find physical keys to be a real pain--which is my own situation.
Let's face it, tiny physical keys really DO have advantages--but so do onscreen keys. BOTH have real advantages, and neither one is ever ideal (compared to a full desktop keyboard).
I love how my touch keyboard changes to suit different circumstances--and I'm not even multilingual! The ".com" button for instance, and the way that certain keys invisibly enlarge from moment to moment, since they spell a "real" word. I also prefer the compact version to the wide landscape version--it's quicker because it takes less movement--but in a bouncy environment I need the wide version. A physical keyboard has only one layout and only one size.
A physical keyboard also is not as forgiving of hitting multiple keys at once--which is THE biggest problem any small keyboard has. I plant my thumb on a letter on the iPhone, overlapping six keys, and only the one in the middle triggers. With a physical keyboard, which one triggers? Depends on the force and angle--too fiddly for me.
So the tactile feedback is nice, compared to the visual/audio feedback of a screen keyboard--but for ME it's not worth giving up all the benefits of Apple's really good screen keyboard. It's certainly plausible that many prefer little physical keys though. To each his own.
(Glad to see texting while driving becoming illegal in more places. It kills people--and not just the people texting.)