The Acer Revo Build’s modules – a wireless charger, a speaker and a GPU with more on the way – can be stacked and hot-swapped on and off the base unit. Each module also has a standard connection for use with other PCs. Drops Q4 2015 for ~$200+.
Ideal for pro-users, Acer’s Travelmate Timeline 13.3″, 14.1″ and 15.6″ notebooks each pack a CULV Core 2 Duo and 8 hrs. of battery but weigh at most 3.5 lbs and measure 1.1″ thick.