Apple 's iPad 4 joins the 7-inch display market . Amazon 's Amazon Fire tablet , Google 's Nexus 7 are among current leaders . Apple 's display screen is bigger than the others , but $ 1 price tag is bigger , too .
Apple 's iPad Mini joins the 7-inch tablet market . Amazon 's Kindle Fire HD , Google 's Nexus 7 are among current leaders . Apple 's display screen is bigger than the others , but $ 329 price tag is bigger , too .