Well, I use UAE and I think it´s great but there are some things that I still prefer to use my A1200 for like games and some hw-banging programs.
I can´t see how UAE, A1, Pegasos or AROS could replace the real thing for that.
Honestly, I too spend most of my time in front of Windows and fire up uae only a couple of times in a week(mostly because I can´t stand graphicsprograms for wintel). It can go weeks between the times I switch on any of my Amigas, but it´s a great comfort to know I have them.
I think the "next generation amiga" will be AROS with UAE simply because of the price.