Can anyone advise me at all?
yes!
is there a big scene for PS3 yet?
as said before, not really yet, but then the 360 Live community carried on from the Xbox 1 which helped
Are the graphics going to look good on a HDTV at 32" @ 720p
I use it on a 26" at 720p and it looks superb!
Any better than what I currently have?
for movie playback definitely better, otherwise just different
Am I really missing out?
only for somegames, I only got a ps3 for games which might not come out on xbox, such as Ninja Gaiden Sigma and Resistance, so if that interests you then go for it, there are some good games on ps3 (plus I bought FFXII to play and even though its a ps2 game its still good!)
Is it going to be worth me spending £1000ish?
if you got it, do it!