iPad Competitors From Samsung, Sony, And RIM Leak; Retina Display Galaxy Tab Coming?

Since it was first released to ravenous buyers in 2010, the iPad has reigned atop and dominated the tablet market, with competing tech firms trying and (mostly) failing to edge their ways in. The HP Touchpad, the Dell Streak, the 16GB BlackBerry PlayBook: All have been swept into the dustbin of tablet history, swatted away by the iPad's continued control of the market.

So: If you're not making the relatively successful Kindle Fire or the Nexus 7, what's your next move in your war on Apple? Well, a steady stream of leaks over the past few days have provided peeks into what Apple adversaries Samsung, Sony, Hewlett-Packard and Research In Motion might have planned to take down the iPad in the near future.

Below, grab a glimpse at some (purported) future tablets from those companies: We've got a bigger BlackBerry PlayBook, HP's eye-catching follow-up to the not-so-successful Touchpad, and a Samsung tablet with a Retina display (Alert Apple's lawyers!). That, and a BlackBerry PlayBook that may finally -- after over a year of promises -- come with 4G LTE connectivity (uh, maybe).

In 2012, many iPad challengers will rise; several iPad challengers will fall. Gird yourself, iPad; here are your newest enemies: