Here's what to expect at Apple's WWDC this week

(CNN Business) — Revamped MacBooks. Updated iMessage features. An overhaul of the iPad operating system. These are among the announcements Apple (AAPL) may make this week during its Worldwide Developer Conference, a multi-day event that kicks off Monday. The annual event is typically a chance for the tech company to introduce changes to the software used everyday by millions of people.