Sony’s Xperia Tablet Z was one of the hottest tablets at the Mobile World Congress, seriously impressing us with its sleek, slim, refined design. At the time, we heard that the tablet would go up for sale during the second quarter of the year. Since then, Sony placed the model up for pre-order on its website, and in the UK at least, was forecasting availability in mid-April. All of a sudden, it looks like that’s changed, and the tablet won’t be ...