Apple is often criticised for apparently ignoring market share. To some, not least to the analysts of Wall Street, numbers are everything. Pile ’em high, sell ’em cheap is, they say, the only means of making a success in the world. I don’t need convincing that Apple’s concentration on quality and workable profit margins is the right policy. But if I did, one glimpse of this window display in one of the seedier stores in Tottenham Court Road, once London’s mecca for electronics and photography fans, would set me right. Just look at that specification. If I didn’t know better it would make my eyes water. And included in that £60 offer is a case and a Bluetooth keyboard. Who needs an iPad mini?