I’ve found a good blog post from someone who has listed what will and what won’t be crippled by DRM, basically everything is fine besides when HD-DVD and Blu-Ray and the ICT is set, when Vista will display 540p, if ICT is not set then there’s no problem.
Read the full post here:
http://msmvps.com/blogs/chrisl/archive/2007/01/25/519180.aspx