@Lee
"most people who have to implement and run the things prefer VMware hands down."
Yes, but mainly because they were used to VMWare in the first place and had no former Hyper-V experience. And yes, if you're afraid to use a command line on Windows, then Hyper-V won't be for you.
"MS Cluster services with CSVs to run properly, which is a frankly poor solution to a very critical problem. You will notice a MS cluster failover - maybe not to the extent that it impacts business but nevertheless."
I can't see how CSV which also provides storage migration amongst other goodies and which can deal with a wide variety of situations to be a 'frankly poor solution'. Live Migration *is* essentially seamless, we did quite a few tests and didn't even loose the ping. It certainly wasn't noticable for an user.
"VMware FT is essentially seamless."
VMWare FT (hint: FT = 'Fault Tolerance') is something completely different than HA (which stands for 'High Availability'). VMWare FT is essentially RAID1 for VMs. However, as far as I know it only works with VMs with 1vCPU, and both VMs have to be on the same VMFS volume. It also means for every VM you essentially double the required ressources (real CPU, RAM, storage space, and last but not least energy) which makes it very expensive. Unless you really *NEED* FT (and there probably won't be many situations where FT is really required), you're better off with HA.
"Hyper-V does some things very well, and others poorly. VMware does some things very well and others very expensively."
vSphere (VMWare is the company, not the product) does some things very well (almost everything is very expensive), some things poorly and some things not at all. Aside from GPU Virtualization (wich especially for the technical/scientific sector is a very interesting feature) until vSphere 5 arrives it can't even handle LUNs over 2TB (2TB minus 512bytes), which quite frankly in this day and age with single hard drives reaching 3TB this is quite frankly embarassing for a product which is probably the one with the longest market presence.
"You just need to look at what you are trying to do and then implement the solution that best fits your needs, within the obvious constraints of cost and functionality."
That's something which I can agree on.