Actually, for me, well I too had an early iPod, then gf a mini, then the 1st genNano (still my favorite - awesome size, weight, function, etc), a 1st gen iPhone, the a replacement Nano 6th gen, but when the time came to replace the dead iPhone... Well I had a choice, iPhone, or iPad & boring old phone. I went iPad 3G, and really it's a brilliant bit of kit, far better for commuting on trains etc for reading.
I too had a laptop (1st gen Air - a long list of Mac kit either side), but I found I didn't use the Air any more... So I sold it, replaced with a mini, screen, etc, and haven't missed it at all.
So yeah, it's had not to lust after the next shiny apple thingy.... But the iPad is really a great piece of kit - even better than that newton 2100 I had (although that had replaceable batteries at least! But it's corners we're way to pointy)