Apple is having a very busy week. The US technology giant has already revealed new tablets including a faster iPad Air that now features an M3 processor. If that wasn't enough to tickle those tech tastebuds, there are more gadgets coming from the team in Cupertino. It's just been confirmed that an update to the hugely popular MacBook Air is on its way with this highly portable PC being given a boost via the mighty M4 chip inside its aluminium shell. Thanks to that M4 brain, Apple is promising