[Asus  Eee Pad Transformer Prime] BarryH_GEG:
Since we're all piling on, I'll join. I get where OP's coming from. And it has less to do with a "keyboard" than it does using any Android tablet as a "laptop replacement."

If you tend to work alone, don't do elaborately formatted word processing, take a lot of notes, and send and respond to e-mails, I totally get how a tablet/keyboard combo could replace your laptop. This profile to me is a student or someone that doesn't use their tablet for work.

If you collaborate via SharePoint/Office, need heavy VPN access and use Citrix, need encryption, do heavy word processing (ToC, multi-level outlines), online conference with WebEx, do more than view Excel and PowerPoint, need Ethernet connectivity, and project using anything but HDMI, you need a real laptop. This profile to me is pretty much anyone working at a company with more than 5K employees. And they, if for no other reason than IT support, need a WinTel laptop.

Trying to do anything detailed like edit a 25+ page document or review a complex spreadsheet on a screen with only 1280x800 resolution is nuts. There are only four possible reasons I see for using an Android tablet/keyboard combination as a laptop replacement and they're not mutually exclusive:

1) Eliminate bulk (that includes the apparatus needed to take a laptop on the road).

2) Better battery life (with less weight, laptops with extended batteries weigh a ton).

3) Light use and only wanting to buy a single device (or having a limited budget).

4) Entertainment is a higher priority than productivity.

I've had four Android tablets starting with the Zoom and am a big fan. But in the end, you don't use a screwdriver to set a nail. Putting snow tires on an M3 doesn't make it as good in the snow as an SUV.

This is my go-to device when I need to stay office-connected and don't want to schlep my full-size laptop. It's got a 256GB SSD, 1600x768 LED display, runs Windows Ultimate and Office, has broadband (VZW), and GPS. In spite of me liking my tablet(s), it’s the only laptop replacement the IT department will allow me to use on our network. As you can see, it is smaller and lighter than an Android tablet/keyboard combo. Along those lines, I think ultra-books and W8 tablets are going to become popular and start to blur and achieve the same foot print as an Android tablet/keyboard. Especially for those whose priority is productivity over entertainment and need to collaborate with others using MS products, Windows, and Office. As it stands, you compromise productivity over entertainment by choosing Android. Only time will tell if MS gets it right and combines the two via W8. If they don’t, and people have to choose, those needing productivity will pick W8.

I also totally get why the keyboard dock makes the Prime so unique. But since Asus, Motorola, and Acer all have about the same market share you'd have to say it's not so unique or in demand that it's causing people not to buy tablets that don't offer it. I'm guessing that's where OP was coming from. It also supports, that for the majority purchasers, Android tablets = entertainment.

I'm not trying to start a war or suggest what's right based on personal needs, but Android (not Asus, the Prime, or its keyboard) has a long way to go before it's going be a one-for-one swap for a full-featured notebook (MS or Apple).