It all depends on what you consider to be a "true" Amiga.
IMHO ...
In the day ... Amiga was a unique combination of hardware magic and software magic that allowed the artist or programmer to create using colour, sound and animation.
Today ... we call this multimedia.
In the day ... the hardware magic was created by combining specialized DMA devices, graphics chips, sound chips, glue logic and a processor to manage it all. That processor just happened to be the 680x0 CPU.
In the day ... the software was tied somewhat to the hardware. The operating system became known as AmigaOS.
Even in the day ... there was talk of RTG, retargetable graghics, and no doubt some people used sound cards as well. A well written program that did not "hit" the hardware directly, could theoretically be used with RTG, different sound cards, etc.
Today ... the necessary hardware exists in almost every x86 PC, as well as Apple MAC, Pegosos, Teron, and AmigaOne. Just add a suitable graphics card and maybe a sound card.
Today ... we can run some Amiga programs on x86 systems by running emulators such as Amithlon, UAE, Amiga Forever, AmigaXL, etc.
Today ... we can also run some Amiga programs on PegososPPCs under MorphOS.
Today ... we can see Amiga programs running on A4000/PPC systems under AmigaOS4.0
"When it is ready" ... we will be able to run Amiga programs on the AmigaOne under AmigaOS4.0.
Until the "AmigaOne" can run AmigaOS4.0, it will not be a true Amiga.
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redfox