As the site points out, several Tegra 4-powered devices have been either announced or released recently. Those include Toshiba's Excite Pro, which is now available for $499.99; HP's SlateBook x2, a convertible design priced at $479.99; and Asus' Transformer Pad TF701T, which was unveiled last week. (Asus hasn't yet revealed pricing or release plans for the TF701T, though.)
On top of that, DigiTimes says the Xiaomi Mi3, a new Chinese smartphone, is also powered by the Tegra 4. Xiaomi officially introduced the Mi3 last Thursday, and it looks like the device pairs a Tegra 4 with a 5", 1080p display, 2GB of RAM, and up to 64GB of storage capacity. I doubt we'll see it on North American shores, but you never know.
Throw in the Shield and Nvidia's rumored homebrewed tablet, and it is starting to sound like the Tegra 4 may not do so badly after all. Perhaps we'll get a better sense of how the SoC is selling when Nvidia posts its next round of financial results, which should be some time around early November.