ap3x :
I completely disagree. Sorry but the 1st flaw in your argument is that productivity is extremely hard to do in the table form factor. Sitting at a workstation or a laptop allows you to do a number of things with speed and efficiency. Tablets are about convenience and ease of use.
Secondly, the cloud requires a large amount of bandwidth. I use Evernote and Dropbox now which are cloud applications and they work great but not over a 3g connection. Evernote does work over a 3g connection because the file sizes are small but when talking about presontations, image files, large documents, media files, applications and everything else the size of those are too be to be productive in any reasonable way over a 3g connection. LTE... perhaps but we do not even have full coverage of 3g with AT&T yet. Mind you, I am speaking from a mobile worker perspective.
Secondly, the cloud requires a large amount of bandwidth. I use Evernote and Dropbox now which are cloud applications and they work great but not over a 3g connection. Evernote does work over a 3g connection because the file sizes are small but when talking about presontations, image files, large documents, media files, applications and everything else the size of those are too be to be productive in any reasonable way over a 3g connection. LTE... perhaps but we do not even have full coverage of 3g with AT&T yet. Mind you, I am speaking from a mobile worker perspective.
Which is why tablets aren't serious yet... and why MS isn't busting their a** to get a tablet OS ready this year. First, when at home or the office you'll probably be on a relatively high bandwidth wifi connection, so that shouldn't be an issue, especially since cloud apps run server side and your only actual download bandwidth comes from the screen output and refresh. And yes, I agree totally about the form factor, which is why a dock is necessary for any sustained productivity use.
Beyond that, by the time Win8 is out all major markets will be flush with either LTE or HSPA+. Testing around Atlanta with my G2 the HSPA+ "4g" I consistently get 4-5+ Mbps download and 1.5+ Mbps upload. That's more then enough for access to cloud apps for Word or Excel and most applications for Powerpoint. It's equivalent to home DSL speeds and low end Cable speeds. For massive presentations with a lot of graphics and whatnot you can just download it to your tablet internal memory or SD card (if available) and run it locally over mini-HDMI.
I am confident the next gen of tablets will have more then enough power for all business applications that don't require a workstation (AutoCAD, et al).
Even the tablets coming out this year are dual core with 1GB of ram.
This is about the time when tablets can replace your basic productivity laptop for everyday use.