Update from Microsoft on the tablet sale duration and availability
Microsoft sent us a note with more details about the promotion. If you're interested in these deals, you'd better act fast-- the Dell Venue 8 Pro discount is only scheduled to last until February 2, and the other discounts are slated to run until February 9.
The discounted prices are valid both at Microsoft's physical retail locations and in its online store. As noted in the article, the tablets are similar in terms of specs, so before buying, it's advisable to check out the device in person, even if you intend to order online.
Speaking of Microsoft sales, the company is also offering the original Surface Pro for $499 at the moment. Not quite as budget-friendly as the Atom-based tablets highlighted in this article, but not a bad deal if you've been waiting for prices on higher-end Windows tablets to fall.