I think what I've learnt so far, from other Member's opinions, is that what started out as a price issue, then evolved into value, has become for me, one of expectation.
Apple's App Store has changed my perception of software being a considered investment to it becoming a disposable commodity. I buy, on average, 2-3 Apps a day, of which 99.9% get junked. I view this buying pattern in the same way as my daily Starbucks and with the same commitment.
I know that fundi-GTD'ers will want me burnt at the stake for heresy, but in recent weeks I have been divorcing projects from OmniFocus into other Apps. My business GTD has gone to FileMaker Go, shopping and errands are now in HoneyDo, stuff to think about is in iThoughts, travel has gone to Travel Tracker and someday/maybe has moved over to iMandalArt. At first I thought I'd hate this, but I've realised I'm a natural for micro-GTD, where Apps that perform specific GTD tasks outstandingly well take precedent over trying to force them into one unified system. I've also discovered doing this means that I'm getting actions done much quicker, far more efficiently and, most importantly, I'm having fun doing them!
The App Store is slated to arrive soon on Apple TV and with the rumours that iOS will be combined into OSX in the release-after-next, appearing alongside touchscreen Macs & Cinema Displays, it'll be interesting to see if Omni can successfully buck the trend of 'price competitively, go for volume'.