In those bulk sets, there are now way more colors than just the primary and secondary colors that original sets came in, way more flat tiles and wedges with stickers or screen-printed imagery from the branded product lines, but kids don't seem to mind.
My 9yo has a bunch of bulk bricks as well as planned sets - Minecraft in particular - and when he gets a new set, he builds it to the instructions, brings it out to the living room to show off his creation, and then before he's walked back to his room he's in the process of adding new stuff or taking it apart to integrate into the rest of the jumble of bricks. I think there are only two builds (both from this Christmas) that are currently intact, and they probably won't last long...