My Predictions for Macs in 2014:
I think Apple will do a minor upgrade to the Mac Mini in early 2014. Consisting of a Haswell CPU upgrade, Switch to SSD (256GB Standard for base-line model), Intel HD 5000 GPU and a price drop for the base-line model. The higher-end model will most likely to include the Intel Iris 5100 GPU as standard and a higher-capacity SSD.
Apple will do a newer refresh of the Mac Mini in late 2014, This refresh is going to be a more radical redesign. Specs wise it will most likely include the Broadwell CPU, Soldered LPDDR3 RAM, Soldered Flash storage, and maybe for the base-line system a Intel Iris "6100" GPU (Iris Pro "6200" for higher-end model). Looks wise it will be slimmer, a new unibody enclosure because the ram will not be user-replaceable. The Price for this Late 2014 refresh I expect the base-line model will be somewhere between £400-£550.
Nothing too spectacular with this model at anytime this year, The CPU will be upgraded to Broadwell, 8GB RAM as standard (most likely for the 13" model) and the GPU will be bumped up to Intel Iris "6100" as standard across the lineup. The Price will drop around £100 for the base-line 11" and 13" models.
Some as the air, minor upgrades across the board. Broadwell upgrade, higher Flash compacity, GPU upgrade to Iris "6100" and Iris Pro "6200" maybe the RAM speed will be increased to the same speed as the new Mac Pro (1833MHz). The old non-Retina Models will disappear and retire and maybe a 17" Macbook Pro with retina will be announced. The Price drop for the 13" and 15" models will drop another £100.
The 27" iMac will include a Retina Display while the 21.5" iMac will have a normal display. Apart from that the iMacs will also include a CPU and GPU upgrade to Broadwell and Iris "6100" and Iris Pro "6200". and a price drop around £50 I'm expecting.
This is going to include some big but minor changes, new CPU, new GPU (most likely called the D1200 for the base-line model), DDR4 memory (RAM limit will be higher therefore, I reckon around the 128GB mark) and a higher compacity and faster PCIe Flash storage. No changes to the price, it will stay the same.
Apple will most likely to introduce the successor of the Mac OS X series, Most likely called Mac OS 11 (or just OS 11). This will mostly likely but not only include - Siri, a New yet familar UI (iOS 7 like), drasticly improved API's under the hood and it being more efficient in every possible way. Mac OS 11 will be a free upgrade for anyone who has access to the Mac App Store and will be available in the fall.
Backlit wireless keyboard will be the new keyboard of choice for alot of Mac (or Hackintosh) users, a new, slimmer (around the current iMac thickness) Thunderbolt 2 Display (23" - 27" models), these maybe have Retina but I wouldn't count on it. Price will vary between £600 for the 23" model and around £799 for the 27" model. A 4K Cinema Display will also be added, this will be a 31" IPS panel with the resolution of 3840x2160 with Thunderbolt 2, 4x USB 3.0 and standard audio in/ microphone output connectivity. The price for this premium monitor will be around £1499 - £2199.
There you go, there's my predictions for this year, I hope you enjoy reading this Essay of a post!