The absence of Flash has hamstrung Apple's mobile devices from day one.
At the launch of the first Internet-connected iPhone it was obvious that there was a notable absentee in the software. Look at almost any website and it would work until you got to an embedded video on, say, the BBC news website. You'd get a note saying you needed to download the latest version of Flash - and then you wouldn't be able to do it.
There will still be gaps in the Apple arena. For example the iPhone and iPad don't run Java - you don't need a lot of technical expertise to understand this, just that it means you're still restricted when you visit some websites (many online forms use Java, so when you want to check the status of an order from some online shops the mobile devices can't read the website).
Adobe's move has been inevitable for a while. Powerful though it is, it was unable to persuade Apple to incorporate its software. Its withdrawal from the mobile market, at least when it comes to Flash, will allow for clarity in the market and the ability to choose a phone without worrying about which version of video it runs.
There will be redundancies and Adobe won't welcome the move initially. For the consumer in the longer term this is going to be positive - but you can expect the job market in Utah to be flooded with a lot of technologists who've just found their skills have become redundant.