Dell is said to be prepping a follow-up to their 5-inch Streak tablet which launched earlier this year. Expected in May of 2011, the device is currently billed as the Opus One and it’s said to be another 5-inch screen, but with a higher, 1280×800-range resolution. Purportedly, this tablet/phone will feature a 1.2GHz dual-core processor when it arrives next spring. We’re only six months away from this rumored launch so we might expect images and details to start spilling out.