Hi, you may or may not know about DisplayPort, it is designed to replace the DVI and the analogue VGA display interface. Here is a link to an article explaining it:
http://www.bit-tech.net/bits/2007/10/22/displayport_a_look_inside/5
The best part is, it allows you to do picture-in-picture and split screen displays.
If Amiga was still running things we would have had that ability from the get go.
It makes you wonder what other things we missed out on in a PC (and console) dominated world...
Dude, even an Atari can do split screen, and all of that has been available to PCs since forever. Even the ET4k chipset supported hardware scrolling, the Mach 64 had a sophisticated blitter (think the ET4k had one too, albeit not as capable), and this was like - what - 15-20 years ago.
Take a look at modern PC architecture. Separate busses, accellerated graphics subsystems, bus master controllers, nifty DMA solutions. It's not like all sane hardware concepts died with the Amiga.
Having said that, of course the Amiga is a wonderful machine and is still useful to date. It should however be viewed in it's rightful context.