First of all, I could not see the video (Sileverlight required?) on my XP with Firefox. Almost 100% CPU until closed down manually. Duh! Found some other Microsoft produced videos against OOo on YouTube instead.
Secondly, Microsoft seems to talk about the difficulty of changing from MS Office to OpenOffice.org -- how about changing from one version of MS Office to the next? I have had quite a few calls from my less IT-savvy friends after they upgraded to a newer version of MS Office. Calls like "How do I do this now? It used to be in ..." I cannot help anymore as I stopped at MS Office 2003 and have not looked at any of the newer versions. I have, in fact, not even seen the Ribbon in real life!
Thirdly, apart from big organisations (or organisations with very IT-savvy people), macros seem to be rarely used. And, as other people have said in their posts, macros can be pure hell to maintain -- especially when the original creator has left the building.
Fourthly, relatively few people use more than the absolute basic functions of the program and using MS Office is mostly due to apparent lock-in and the "Lemming Effect".
Fifthly, the cost of maintenance, especially in the bigger organisations that use more than just the most basic functions, is huge.
Sixthly, the cost of MS Office is too high (even the Student Home Edition or whatever it is called) -- especially when compared to the actual functionality used by most people.
Seventhly, MS Office interoperability with other products (even previous versions of the program) is, to put it mildly, seriously lacking.
I find it difficult to accept that so many organisations (especially public bodies) that seriously lack money keep paying over the top for MS Office despite having a number of perfectly good alternative choices. I also find it difficult to understand that governments accept that some solutions that most (if not all) departments have to report into or use, demand the use of MS Office. Some organisations cannot archive their documents unless they are in MS Word format!
I keep MS Office 2003 as I often have to deliver proposals and reports in MS Office format (by customer demand) and I need to be fairly sure that what I write is what they see -- properly formatted. This is currently not guaranteed when using other products to make MS Word files.
So, all in all, I do use MS Word, but only because it is the only program that "interoperates" with MS Word -- i.e. vendor lock-in. Sigh!