That leaves the AppleTV. I keep holding out for a hardware refresh, but the truth is all my content is stored on drives in my MacPro. All I *really* need is an interface to stream stuff and for that any AppleTV will do.
Can anyone tell me with the A/V system I have and for the purposes I need, what any hardware refresh could do for me that I should hold out for?
In summary, you have a 1080p TV, 5.1 surround, a MacPro for movie storage & streaming, and will soon have a BD player in that PS3.
I don't know about endorsing "waiting" for a next-gen

TV, as the current one sure brings a lot of joy to a setup like yours- even with it's hardware limitations. For example, would you pay the price for:
- easily pumping your itunes music library & playlists through the best speakers in your house?
- having your digital photos in iPhoto readily available to show on the biggest screen in your house?
- having free access to youtube and podcast video on the biggest screen in your house?
- having an easy way to show all of your iTunes video (home movies, dvd rips, etc) on the biggest screen in your house?
In my case, almost any one of those justifies the price. Remember when a CD multi-changer cost $400+? Remember when digital picture frames cost $300+? Etc. If any of those are worth the cost of the current

TV, go get one; you'll love it! It does all those very, very well, and several other bonus items too.
So why wait for next-gen hardware refresh? There's lots of popular wishes for a next-gen

TV. I think the "big 10" are:
- full 1080p HD capability- the current hardware is capped at a limited incarnation of 720p (just barely HD)
- built-in BD player to kill 2 birds with one stone
- built-in DVR functionality to kill 2 birds with one stone
- open hardware expansion options (like normal USB) so that other hardware companies can offer add on functionality if Apple doesn't want to kill X birds with 1 stone.
- open development/API/app store so that it can have widgets or iphone-like apps
- full codec support (without hacks)- if Quicktime can play it,
TV should be able to play it too
- content source support beyond iTunes: netflix, hulu, etc
- central server functionality so that it can store all your iTunes content in one place and all the computers in the house could draw from that 1 library
- much greater internal storage options- probably a bigger box for 3.5" SATA drives, enabled (Apple-endorsed) external storage options, or network (don't have to leave my computer on all the time) storage options
- more robust hardware (no UI stalls: quick, crisp, snappy)
I've been waiting for a next-gen

TV with some of these features for a few years now, almost since I bought the

TV I have. It is frustrating to see many cheaper boxes come out with some of these kinds of features, know that Apple could deliver them too but simply chooses not to (yet???), and so want to buy this product from Apple.
The fanboys come up with all kinds of misguided "Apple can do no wrong" logic to justify

TV as is (U.S. bandwith can't handle 1080p downloads, where you going to store huge 1080p movie files, iTunes doesn't yet have 1080p downloads, the studios won't undercut BD business, Apple can only focus on one thing at a time, blah, blah, blah), but the reality is that Apple could deliver a next-gen that fulfills a lot of very popular BUYER wishes if they wanted to do so. Many less capable companies have put forth little

TV-like boxes that show that it is technically possible- even easy- to deliver on some of these wishes. Apple has just lacked the will to make it happen (so far).
As an Apple fan, I'm confident they'll do it the best when they get around to it, but I have been waiting a LONG time for a next-gen

TV. I wonder how much longer Apple will choose to stick with very dated hardware. Waiting for Apple to move on things other than Macs, iPhones and iPods can sometimes be like watching paint dry.
Next gen

TV might launch today, or we might still be wishing another year from now. The current gen is pretty great, but my money waits for upgraded hardware suitable for 2010 standards.