It takes a lot of resources, has a lower performance [...] breaks compatibility with software that worked perfectly [...] "we'll help you keep your system secure"
And none of this is necessary or what any sane person would want. Also, it's not "we'll help you keep your system secure", but rather "We'll patronise you, you stupid motherf...er. We'll just do what we think is right, because we know better anyway".
The only thing I find interesting about Vista is what game developers will be able to achieve with DirectX 10
This is one of the most severe implications of Vista. I'd wish that people finally realized how serious this trend is.
Graphic card vendors are only too happy to drop support for OpenGL in favour of DirectX, since they only have one development branch that way. All major manufacturers are months behind schedule to properly implement OpenGL 2.0 (for ATI, it's "years" rather than "months"), and the OpenGL 3.0 specification is long overdue too (because the same firms have their chair in Khronos). On the other hand, game developers concentrate on DirectX because the support from the major PC graphic card vendors is by far better (which again is a reason for these to not concentrate on OpenGL).
The long term implication of this is that OpenGL
will not have has no access to techniques that are readily available in hardware, which
will alredy does negatively impact all non-Windows-game or cross-platform or academic development.
When Microsoft announced that they intended to drop OpenGL in Vista, a lot of people were upset. But this exactly what is happening now, except it's the graphic card manufacturers who do it, and everybody is all too happy with it.