The Samsung Windows 7 Tablet that was just announced is $1099 (at the low end), so I'm just reporting the current state of affairs. Sure, you can get a notebook that runs it for less, but that's not a tablet now, is it?
There's simply no way to do a 1:1 comparison today, the Windows hardware/software doesn't exist and Apple's not giving you their 2012 preview any time soon.
Well, as you note, there is no way to do a 1:1 comparison. The Samsung "tablet" is more comparable to the Lenovo X220T notebook than to anything in the pure tablet world. It has 4Gigs of memory, runs an OS designed for a laptop, and sports a Core I5 processor. I suspect that almost none will be sold without a full 128G SSD, keyboard, and dock, bringing it to the $1349 price. That's hefty for a "tablet" but it's about $200-$300 less than the comparable touch enabled Lenovo tablet/notebook and has a bigger screen.
In short, it's a notebook in with a 1366x768 touch screen. As the folks at Laptop Magazine note, it's simply a Series 9 laptop in a different form factor, not really a "tablet" in the current sense of that term.
Samsung is clearly hedging its bets with various form factors, features, and capabilities in different models, some looking like "tablets" as defined by the iPad, some as one-hand devices (the Note) and some like this one as a (pretty powerful) notebook with a detachable keyboard. Its natural competition is not the iPad; it's the Lenovo X220T on one side and the 11" MBA on the other.
With Windows 8 the positioning may shift significantly. Much more comprehensive touch screen support and presumably the potential to run on less powerful chips but with a full scale PC operating system. There will remain a significant market for devices like the Samsung "note-let" that bridge the gap between tablets and full scale notebook computers but I suspect we'll see models at about $800 that tilt toward the tablet but still provide more comprehensive support for true PC applications.
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Check back in two or three years when this is actually out.
In "two or three years" the first generation of Windows 8 tablets will be obsolete. I'd put money down that the the first generation is here before the iPad 3.