Brief thought: Apple introduced the iPod touch name back in 2007 to distinguish the sole touchscreen-based model in its iPod lineup from other devices that were Click Wheel- (iPod classic/nano) and button (iPod shuffle)-based. What happens when there’s a low-end touchscreen iPod in the family—is the iPod touch name really necessary any more? Apple axed “photo” from iPod photo when it “merged” the iPod and iPod…