1) The Pre will be Sprint exclusive for all of 6 months. Then Verizon will get it, and GSM carriers within a year. There are LOTS of people who don't want to switch carriers or are mid contract, etc. This is the iPhone for people who don't want AT&T (and there's plenty of them).
And you're forgetting about the iPod Touch.
2) Software lockout. Apple has the iPhone locked down pretty hard (not that you can't hack it, even easily, just that you have to hack it to do much of anything Apple hasn't preordained). Not sure how the Palm will hold up to thins, but it's likely to be better than the iPhone.
Palm apps are almost exactly like the original iPhone web apps (as far as we can tell with the limited information available). They will have nearly the same abilities with the exception of the Palm web apps being able to run in the background while the iPhone web apps could not. There is no difference with respect to lockout as there is no store for web apps (which is what you're complaining about, not lockouts).
I think you are also missing the mark on the "missing sync". Syncing is very 1990's, imo. No one wants to sync. We should have realtime multidirectional push with the Cloud. Which Palm just might deliver, and where the iPhone fails pretty bad. See:
http://arstechnica.com/gadgets/news/2009/01/of-clouds-palms-webos-and-cutting-the-cord.ars
Define fails pretty bad. The iPhone has access to exchange servers (and mobileme, which is vastly improved over the botched launch). By denying the ability to connect directly to a computer and forcing users to use only over the air syncing Palm is in fact limiting the choices, not increasing them.
The iPhone may sell to "hipsters" and iPod obsessed techies (I include myself here, I have an iPod touch and love it), but the Palm Pre may merge that market and the Blackberry crowd into a single media rich, business capable device. Maybe. It's too early to tell, yet. I'm getting one, though, assuming the price is decent - I have a Sprint SERO contract (500min, 7pm N&W, m2m, unlimited text/photo msg, unlimited data for $30/month) so the iPhone is just a non-starter for me. I'd pay over 3x the monthly fee for similar service. No thanks.
As far as I can tell the Pre is not this device. Lets go through your description of the phone compared to the iPhone.
Media rich: Let me know how over the air sync works for you there.
Business capable: Both have access to exchange servers. I'm not sure about the Pre's ability to be remote wiped (nor other security features).
US Carriers: Pre will likely be available to different carriers.
So what will make the Pre perfect by your standards is that it is less capable as a rich media device but is sold by more carriers in the US.
I'm sorry but you're incredibly biased.
I'd love for Palm to succeed but they just aren't living up to the hype as far as I'm concerned. They have been silent on battery life as well as specifics regarding web app development. There is a lot of conjecture here and as far as I can tell it usually stems from someone's iPhone pet peeve (yours being carrier options, others include physical keyboard, the whole "open"/webapp thing, not being a company named Apple, etc...)
Lets wait to see something close to the released product before we go heralding this as the solution to everyone's problems.