I believe "they" were all the people poking the project asking when were they going to support virtual X and virtual Y. He basically stated it would never happen on OpenBSD[1] but here we are with [2] (vmm/vmd/vmctl).

[1] http://www.tylerkrpata.com/2007/10/theo-de-raadt-on-x86-virt...

[2] https://www.openbsd.org/faq/faq16.html

[1] probably isn't the best source out there, I was in a bit of a rush to find it but that is indeed the quote! Gotta either love or hate Theo I guess!