That has been the consensus of a lot of developers for about a year now. No Apple support hurts. However, the real reason is that the modern browsers lessen the need for Flash. Chrome, IE9, and Firefox all competing are going to cause rapid improvements in the traditional experience. All have great releases this month, for example. I'm sure Flash will be around for a few more years. How quickly it goes depends on the mobile market, IMHO. If Android phones and tablets run Flash well, it will survive a bit longer.