I have a computer hooked directly to my TV, and find anything at all that I might want to watch...
BUT, For folks that want a more ordered presentation, I can recommend Roku. For somewhere between 30 and 100 bucks or so - a one time purchase of their controller, It allows painless access to all of the subscription systems (Netflix, Hulu, Crackle, Amazon, etc,) as well as a many channels of free programming, especially if you have kids (lots of kid stuff is free).
The nice thing is, if you decide to try Amazon for instance, rather than buying their gear, only to find you don't like it, the very same subscription is available through Roku without having to buy any other gear.
The bad part is, you'd need a box for every TV, or move the box or stick between TVs...
That's why I stay foot loose and fancy free. I can easily find used computers capable of running a TV, and a cordless KB/glide pad costs about 30 bucks... For my 3 tvs, I am happy to buy the pooters rather than invest in Roku boxen.
YMMV