What an unexpected delight!
Listen up all you Sons of Sega, you Genesis Generation, you Dreamcasters, you People of the Blast Processor. Treading in the wake of Mega Man comes this retro futuristic gem from the ole blue blur, Sonic the Mutha-F***in' Hedgehog, always down but never out.
Sonic 4 is actually out for several platforms: Xbox Live, Playstation Network, soon it will be on the various iThings. On the Android side, it's currently only availible for Nvidia Tegra 3 powerhouses, but will become "omniandroidal" soon.
I think this the route that the ailing Sonic franchise needs to take, a return to it's original style. Not everything is meant for three demensions.
$6.99 is a small price to pay for potentially epic nostolgia.