Apple Inc (NASDAQ:AAPL, XETRA:APC) kicks off its annual Worldwide Developers Conference on Monday with Wall Street expecting the company to lay out an ambitious AI strategy anchored by a significantly upgraded Siri and deeper integration across its software platforms. The June 8 event in Cupertino is widely seen as a pivotal moment for the iPhone maker, which has faced mounting pressure to demonstrate it can compete in the rapidly evolving artificial intelligence landscape.