If I can keep on doing for free what I currently do on PSN for free after the premium accounts are introduced then premium subscriptions neither affect me or interest me.
However, being the tightwad that I am if the PSN premium subscription is (say) NZ$100 per year and I can get NZ$101 of free stuff that I want/like from PSN each year then I might just sign up for it. I doubt they'll offer enough really compelling stuff to make it worth my while though.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix