Apple's rising market cap and impressive continuing growth in revenue and earnings places the company in the thin air space among global enterprises. No matter the past few days of a falling share price (a pull back from the accelerated gains following the quarterly earnings report), the company is among the most highly valued companies when ranked by market cap and outranks all but a few of the current DJIA components.
It's not an issue of "if" Apple will be added as a component to the most closely watched stock market performance gauge in the world. It's a matter of "when" Apple will be added to the index of 30 select stocks. The only question is which current component it will replace.