Hence the OP's mock up.
The last time I checked, the industry as a whole had almost completely phased out 16x10 in favor of the HD 16x19 format (22" and 26" screens). The space inside a 26" iMac would almost certainly allow for more ports as well as a better GPU with dual monitor connections (even if Apple forces it to use their proprietary crap)Hence the OP's mock up.
I love it. I believe the next gen iMac will look very similiar but I'm sure it will only come in the 20" and 24" sizes, will have a maximum of 4 USB ports and probably won't have a DVI port.
But Apple trying to make sure you solely stick with the Apple brand? My brother has an iMac and he wishes he could use it for his Xbox, but he can't, so what does he do? Well, he ain't going to put more money into Apple since their displays are dang expensive, so he goes and buys a monitor from a competitor.Apple trying to save money for the consumer? Dream on..