I finally have enough to get my first iPad after chasing that dragon since Oct. 2010. I'm glad news of iPad 3,6 leaked just days before my birthday so I knew not to jump into something that wouldn't have been what I had waited so long to get: the top-most tiered set.
That being said, if Apple should release an iPad 5 in March, can't say I'd be too upset because it's what I need (want...) now. I work in furniture retail, and we're about to hit our slow season. This will be great for catching up on reading books and comics as well as writing a few projects (scripts and a book) in the vast amount of downtime I will have, which helps to keep me distracted from how much money I'm not making. I used my buddy's 1G iPad in April to bang out a few scripts at work and it's still incredibly useful, if a little dated. It still works just fine for what it's needed for. It didn't completely shut down when it was left behind.
The point of all this is that if you're getting 2.5 years out of a device in today's market and it still works in the same condition as the day you bought it, what are you complaining about? Everything changes too quickly nowadays. As a filmmaker, there have been at least a dozen different accepted digital movie file types in the last 7 years. Accept someone is going to change it up, adapt, and move along. Otherwise, you might as well switch gears to an industry like furniture where the last big feature was the detachable back to a reclining sofa.
If apple releases the iPad 5 in March, well, I got what I needed out of it, and it's likely to give me another few years (two to be exact with Applecare+) of usefulness.