This year is going to be the year of the touchscreen tablet, of that there can be no doubt.While tablet PCs have been around for yonks, only now are they becoming the desirable, usable and functional devices that we've always wanted them to be – and it's about time too.The iPad is currently the most obvious example of how tablets are going mainstream, but that's not to say that all tablets released from now on are guaranteed to be super awesome.