I was thinking the same thing. Let's hope "low cost iMac" is the MacMini.
I doubt, personally I consider the "low-cost" iMac to be current spec model with cheaper unibody (some plastic, cheaper screen), while the new iMac will arrive in two variants std, and iMac Pro, the later with 28" 4K display, dual GPU, high en i7/low end xeon cpus, SSD only storage and Black Unibody.
also there are consistent rumours on a new round shaped Mac Mini, having also a discrete GPU as top-end option, looking as a smaller silver Mac Pro.
All new iDevice (except Gaming iTouch) will have TouchID, Apple may Offer Later TouchID on some MacBooks too (maybe next year), Pink/Cherry and Golden Colours may be available too on iPad Minis -soon-.
Another Rumour VERY CONSISTENT is LOSSLESS HD AUDIO (24bit@96Khz), Apple will sell HD LossLess version of popular songs at iTunes, also will enable 24bit HBR audio capability on some iPhones, along selling iPhones with 128GB of storage to make room for huge LossLess HD audio clips (most requires upto 60MB each).
First we will see at WWDC: the new Mac-mini, and the Cheaper iMac/iMac Pro (as well a 28"4K Thunderbolt Pro Display -again in Black-), and maybe the Colored iPad/iPad mini (red,pink/golden/blue).
The High Bit Rate Audio Revolution will arrive with the new iOS 8 (and announced at WWDC), OS/X also will shown a flatter icon set consistent with current iOS theme -that's very obvious-.