The Dev version feels as if Microsoft is trying to convert Windows to a tablet OS instead of developing a proper tablet OS from the start. And because of that, Win 8 will more likely kill itself than successfully kill off a competitor.
I've been trying out various tablets for years, and they've all been incredibly frustrating. They've all felt incomplete in that they prevented me from efficiently doing the kind of work that pays the bills. The older Windows based tablets were hampered by a user interface simply not designed for touchscreens, and the current crop of App-centric tablets (iOS and Android) are designed to push non-productive garbage apps to an unsuspecting public with the goal of separating the users from their money.
For me, money-making productivity includes at least one essential tool: OpenVPN. I support multiple sites, and require secured access to those sites. VPN software combined with VNC Remote Desktop software allows me to support my corporate customers securely and reliably without the need to purchase any proprietary software that could be full of undisclosed security holes due to their secretive nature.
Windows and Linux based platforms give me access to all of the productivity tools I need, but their user interfaces simply aren't designed for tablet use. And the iOS and Android platforms are extremely hostile towards VPN software, offering only an extremely limited selection of VPN choices not suitable for my needs along with not allowing alternate VPN solutions from being considered, much less implemented.
It's ironic that the only touchscreen device that comes close to fulfilling my needs is my Nokia N900 phone with its Maemo OS, now that Nokia is trying to save itself with a Windows based phone.
Despite being "junk food" platforms, iOS and Android are already highly successful platforms with the unproductive home user who would rather play Angry Birds than get any real work done. But for the business user who wants to be both productive and accessible on the road, the traditional laptop is their only choice.
Windows 8 has the potential to fill the gap the business and IT world need to have filled, but Microsoft must get their act together. They need to develop a proper tablet OS, one that doesn't require us to go through a proprietary "app store", and not develop a side-engineered doomed-to-failure Windows hybrid like they're doing now.