I do not know if this has been posted yet or not, but it would seem that Microsoft has discovered the need to rethink the current display driver model that is due to ship with Vista, which may require users to invest in a new graphics card in the near future.
As one who owns a notebook and who knows the lag time between release to manufacturers and public availability of a notebook graphics card (if available in the correct form factor at all), I find myself wondering about the viability of the currently manufactured "mainstream" notebooks.