The Android tablet, dubbed "Streak Pro," is expected to arrive as early as June powered by a 10-inch display (1280 x 800 resolution) along a 1.2GHz Nvidia Tegra T25 dual-core chip. Dell is planning to install its Stage 1.5 UI on top of Honeycomb and apparently it'll also throw in an "enterprise application stack," which suggests the company will pitch this as a business oriented device. Also, unlike the original Streak, which doubled as a phone, it seems its 10-inch brother will be data only -- though that doesn't mean you won't be able to use VoIP applications of course.
The two Windows 7 tablets are set to follow the Streak Pro in July and October. First up will be a 13-inch model, the Latitude XT-3, which will take the old 'convertible' form factor like most pre-iPad offerings. As such you can expect hardware comparable with a full fledged laptop, including a standard-voltage Intel processor from the Sandy Bridge family, 4GB of RAM, full HD 1080 support and stylus input capabilities.
Meanwhile, the Latitude ST arriving in October will be a 10-inch unit carrying one of Intel's upcoming Atom Z6xx series Oak Trail tablet chips clocked in at 1.5GHz. The design will be more in line with today's tablets and its specs will include 2GB of RAM, up to 128GB SSD storage, dual cameras and eight hours of battery life.
There's no mention of pricing in the roadmap so we'll have to wait a bit more for those details. Interestingly, despite Dell's apparent vote of confidence on Windows 7 as a tablet platform, its CEO Michael Dell was recently quoted as saying he believes that Android tablets will eventually dominate the tablet market, just like its happening with smartphones.