Essentially you need to understand the difference between ANY tablet and a laptop. I think a lot of people just assume the Transformer is a laptop/desktop replacement because it has a keyboard dock, the dock just makes it easier to type and adds some nice shortcuts. It's like a netbook in that respect.
In the Primes defence and the reasons I bought it, it has an HDMI out, a USB port and it's ridiculously fast, with a battery that lasts around 15 hours of heavy use (I've done this, so I can speak for it's claims).
Also, using Dolphin browser, I can play flash video and watch it full screen in HD on my television using the HDMI out. So, for those of us with subscriptions to services like MLB.TV etc, we can run games in HD through our TV.
I can also hook an external hard drive up to it and do the same thing, playing HD videos and not taking up precious internal hard drive space.
So for me it's a portable media device (Audio/Video/eBooks/Games/Magazine reader) that also doubles up as a VERY capable netbook. If you add to this the ability to unlock and root the device, squeezing even more performance out of the tiny thing, it's a winner.
One more thing, I have a Galaxy S2 phone which can act as a portable wifi hotspot which the Prime can use, and it's surprisingly quick for browsing the internet with when I'm nowhere near a wifi hotspot/home/freinds house. This means I only have one sim card and more importantly, only ONE BILL to worry about paying.
So for me, it's just about as perfect a little thing as I need. And it's not an Ipad.
Hope this helps.