I could afford a Thunderbolt Display but I'm wondering if it's worth it. How much better is the TBD on your eyes and do you notice a decent difference in clarity?
Note: my experience is of the 27" Apple Cinema Display (with DisplayPort for older Macs without Thunderbolt) rather than the TBD but AFAIK the actual displays are identical.
Pros:
+ The ACD/TB blows any $300 TV/monitor out of the water in terms of colour, clarity and screen real-estate.
+ If you have a MacBook Pro then even the docking facilities of the ACD are handy (built-in Magsafe PSU, USB 2 hub, not-half-bad sound system, FaceTime camera). The TBD adds even more with Ethernet and Firewire
Hmmms:
~ Glossy display is a love/hate thing: some people get bugged by the reflections, other people don't notice them and enjoy the contrast & vivid colours. As long as you can position it so it doesn't directly reflect a light or window, it's actually better in bright light, as light hitting at an angle gets cleanly reflected away rather than smeared over the screen. Others don't like the "sparkle" you can get on anti-glare screens (like the Dell U2711). Unfortunately an Apple Store with all those spotlights is a pretty pesimal place to try one out. (Oh, and your cheap TV/monitor might be glossy anyway).
~ Docking facilities not such a big deal if you have a Mac Mini. TBD won't work with a Mac Pro.
Cons - just one big one:
- That $300 TV/Monitor will probably have HDMI (and hence DVI) and maybe VGA inputs, so it will work with PCs, XBox/Playstation, Blu-Ray player, media streamer, older Macs etc. Heck, it may even get TV... It might have multiple inputs that you can switch between. The TBD is Mac-only (until/unless TB takes of on PC) and then only works with newer Macs.
If the latter isn't an issue for you, and you've got a grand burning a hole in your pocket then I'd be tempted to go for the TBD.
The middle way would be to go for a 24" 1920x1200 display rather than a 1080p telly.