SSD better for rendering video?

I do lots of video and photo editing plus image design. So, tons of writes and reads to my disk. I'm waiting for the new MBPs later this year and hoping there will be some improvements in the SSDs they use.
From what I've read, SSDs suffer on writes, which can also reduce their overall life. I've also read that empty to full space should be a 1:1. Meaning, for a 128GB drive, 64GB is free and 64GB is full. Is any of that true?
I haven't been able to find any reviews related to SSD performance for video rendering or image design. Would anyone have some ideas or actually use an SSD in the above scenarios? Would it be overall faster than a 7600RPM HD in MBPs? How would it compare to a 5600RPM drive?
Interesting read on the previous post about SSD and photography editing. However, video is a constant long write (3+ hours).

You know eww I've read that in so many places, and said by so many - and yet I've never seen this to be true. I'm not saying it's impossible of course, but like I say, on a laptop I've never seen this born through.
Even a fully write saturated mid-market SSD is still significantly faster than any physical drive I've seen.
For example:
AJA Read/Write test - 4Gb - 640Gb Western Digital 2.5" SATA
http://grab.by/2q0s
AJA Read/Write test - Fully write-saturated Corsair P128 SSD
http://grab.by/2q0c
I know it's fully write fatigued as it's running full disk encryption - which should slow it down.
Little bit different don't you think? It's the same for any test you can come up with. Small files/big files, sustained writes etc.
There are of course things to consider. You could be limiting the life span of the drive with high volume writes. Once it's write fatigued you'll need to erase it to bring it back to full performance (the example above is while it is fully write-fatigued already).
You can read about doing a 'proper' write erase on an SSD here: http://www.markc.me.uk/MarkC/Blog/Entries/2009/8/13Erasing_anSSD.html
If budget isn't a concern, and you can work with the spacing, then an SSD will leave a physical drive for dust IMO. I've been through quite a few SSDs as fortunately I don't often have to pay for my h/w.

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