That comment is synonymous with ignorance.Not that I think it *will* be flat but you're not alone.
Flat design is synonymous with lazy designer.
There's a 100% chance that no matter what Apple announces, the tech blogs and commenters will scream "but, but... Google, Google, Google. Apple is done. Sky is falling".
Let me guess you like gradients, outer glows, bevel and emboss plastered all over the place...Minimalism = lazy.
Saying minimalism is laziness is very ignorant. Try telling that to professional designers. There's a saying: less=more.
Minimalism requires using the elements of design including, shapes, colors, typography, proportions, repetition / rhythm, lines, etc. Just because it looks simple and flat doesn't mean thought wasn't put into it.
EDIT: Going by your post history, I'm not surprised by your comments. I bet if/when Apple goes flat and Google were to go glossy and what not, you would all of the sudden love flat design because Apple does it.