I can afford one. But if I got one I would lose rights I treasure. I can't upgrade a TiVo without violating its contract. I can't really buy a TiVo (only TiVo services), and I remain under the control of TiVo for the life of the product. Yet TiVo is based, at least in part, on some GPL code.
I'll buy a TiVo (or something like it) only when I can get one that gives me all the rights I have with my old VCR, not before.
"TiVo-ization" means building systems on top of free software that restrict users's freedoms to modify that software itself. Without the ability to upgrade, the freedom to make modifications is useless.
It is this form of TiVo-ization the FSF says it opposes. Got a problem with that?