My thoughts were in terms of a dedicated Media Center PC - no other work is done on it at all. After upgrading to a newer PC last year my former PC, which was still pretty decent, was sitting pretty much unused. So when I wanted access to the new HD channels (plus my TV was a dinosaur 20 years or so old at a guess - maybe more - RF input only), and had been shopping for ages for a budget way to access them without much success (and got knocked back for my application to be a TiVo beta tester), I jumped in and made the older machine my main living room TV. I sit about 3 metres away from it where my work desk is located.
For a screen, I had a 22" widescreen monitor on the newer PC, so used that, and bought a TinyTwin Tuner. Once I finally got some old, ongoing antenna issues solved I have been pretty happy with performance. But that lead me to this post, as I saw prices just lower and lower on 26" to 32" TVs, as well as on Dell's older 24" monitors. A side benefit of course would be to get my 22" back on my work computer
... and there is an epilogue to the story too. After I posed the question here I pretty much convinced myself that if there were any negatives to using a TV, they would be outweighed by the extra 10" on the MC and 2" on my work computer. So I jumped on the $499 deal while I could (it was a one day offering at CatchOfTheDay). Can't really afford it right now, but I guess my credit card will just have to live

. Yesterday the set arrived and I am absolutely delighted with the results. It's a Conia with Samsung Panel, inbuilt SD tuner (useful perhaps as a backup if for example, the power supply on the PC dies etc) and 1366x768 resolution. Currently it's connected via VGA, but I have a DVI-HDMI adapter on order that I should get in a few days ($11 on ebay).
This was the second time the deal had come up on catchoftheday.com.au so if it comes up again, I highly recommend the set. I don't think you will find a comparable price elsewhere for a while even if prices do continue to drop generally.