I think this is a point-in-time issue that will get resolved soon. I know Apple already has an office suite called iWorks that allows you to create content, including presentations, on your iPad. I know there are at least two other office suites for iOS that have good potential. For Android there's QuickOffice Pro and OfficeSuite Professional, both of which allow you to create and edit MS Office documents. I haven't found a product that handles ODF, though.
I'm not stressing about not finding an office suite that I can run locally on my tablet, though. Storage is limited on a tablet and I wouldn't want to crowd it with lots of files that I may only need sporadically. I like the fact that the tablet forces me to narrow my context and helps me focus on what I need to work on. Instead of carrying my 500-GB hard drive with me (I thought about that), I can focus on just taking what I need--as opposed to my entire digital life--with me. I can upload just the files I need (and nothing else) onto the tablet's SD card (I got a 16-GB Class 10 card) and go.
There are a few "mainstay" files I always need ("What's New in IBM Sametime", "The IBM Sametime and SUT Roadmap", etc.). These are files that I'm updating constantly and it wouldn't make sense to have outdated copies on my tablet's SD card. The solution lies in the IBM SmartCloud for Social Business (LotusLive) Connector for Lotus Symphony. Whenever I update one of those files, I upload the new version to my file repository. That way, if all I'm carrying with me is my tablet, I can just log into my IBM SmartCloud for Social Business account and get what I need.
This brings me to what may turn out to be the utilization paradigm that will make tablets stick: cloud.I have to confess that before getting this tablet I hadn't found a mission-critical reason to make daily use of my IBM SmartCloud for Social Business account (I didn't even remember my password!). Now I don't think I can rely on my tablet without it. The most interesting thing is that I don't need a VPN client to have access to it. In the future, once IBM Docs supports Android, having an office suite will be a non-issue.
This experience is also giving me valuable insight into how Sametime will fit into this equation. The dynamics of "current context", i.e., what's in the foreground, will change and, with it, how we experience situational awareness. We'll have to rethink what the idea of "presence" means, what kind of information becomes pertinent at a given time and whether it merits to be shown, and how we enable real-time communication among users and devices. It's challenging and interesting.
The most important point of all this is that, for the first time, there's a lightweight computing platform with enough potential to replace traditional PCs. Based on what I saw there were more tablets than laptops at Lotusphere this year. That's very encouraging.
This doesn't mean I no longer have a need for a PC; at least not yet. The one thing I still need my laptop for is to play Battlefield 2142 Northern Strike when I travel. I just don't do Angry Birds. I can't; I won't!