Win3.x was what was available when the A1200 and Falcon came out, making it the right measure.
TOS failed even by that measure, AOS.3.0 was "state of the art", wether it was just as good or better than Win does not really matter.
Actually quite true.
I was working with 68K systems when Win 3.0 was in its beta stages (we had early copies provided by IBM).
Although primitive, Win3.1 did give PCs some parity with the Amiga once the MPC standard was more widely adopted.
And the ST couldn't match either system.
You guys have to remember that while somewhat inferior, MPC based systems had many of the features that the Amiga processed (and a few they didn't).
Its not any big surprise to me that one of the big backers of the MPC standard was Tandy.
They also produced some of the first MPC systems.
Remember, they had a good working relationship with Motorola (so good in fact that they requested and got a specific upgrade to the 6847 VDG used in the Color Computer - the 6847T1, note the "T" designation, AND they had some help in designing the custom chip that replaced that in the Color Computer 3).
How do I know that?
I had phone access to their engineers directly (remember, we were developing 68K based systems) and they were pretty free with information.
So...in case you don't know where this is going...one of the early backers of the Windows based MPC standard was quite familiar with Motorola based systems and you can be assured that they were aware of the Amiga.
In fact, the Amiga was the standard I think they were aiming at, not other PCs.