So, erm... your idea is to make something better than what is currently available?
Ok, so go away and do it.
Go off and design and produce the new hardware that is as groundbreaking as the Amiga was in '85, and then write the new OS from scratch that will make Mac and Windows users say 'Wow'. Oh, and you could write the Multimedia production software you were talking about too, since until your new computer has sold tens of millions of units, nobody else is going to be bothered to write it for you.
Of course by the time you've done all that (a conservative estimate would be 10 years, assuming you have a kick-ass development team and several hundred million dollars to spend on R&D before you even see 1 cent in revenue), the Mac and Windows machines/OS's are several generations down the line and make your new wonder machine look like a Commodore PET.
But at least then you can come back and tell us about it. Until then, your 'idea' is nothing. Sorry, but every man and his dog has 'ideas', it's implementing them that takes skill and vision.
