LOL i do love this site sometimes makes my day, if you really think the majority wont buy android phones now because apple finally increased the screen size you are wrong. Sure people will move to iphones, but not the whole world as its put, I have had Samsung phones since the Omnia and i do like them no question, lately less so because like apple its just small incremental upgrades, but being a dev on XDA im pretty sure there are 5 million members who wont be switching for a start.
I have the mega so no other screen suits me, but ill give you a few reasons why i wouldnt switch. IOS is not open enough for ME (its perfectly good os no argument) A smart phone without TASKER is well not so smart (again for my useage), Xposed Framework is a thing of beauty bringing unity across different versions of the os. And i have a lot invested in the ecosystem, so why change?
Samsung and Apple are key players that push each other which is good for everyone, and with other companies coming up through the ranks, i.e LG, ONEPLUS and the chinese players then ultimately we will all benefit, end of.
Another reason i wouldn't switch personally, is the cost vs what you get for your money in tech terms. My MID Range galaxy mega came with a big hd display, ac wifi, LTE, decent camera,decent processor, huge battery, expandable memory, 1.5gb ram and cost £390 new on release day. A Oneplus one 64gb model with the best tech (worst customer support mind) is only £290. I dont mind paying a bit for all the work that goes into it but im not paying a huge margin just to say i own an apple product especially when some parts of the phone could do with being upgraded (battery and ram). However when it comes to macbooks thats a different story!