Yep on the keyboard. But I think the iPad is a “third computer.” I can’t see anyone other than a really light user having an iPad as their only puter.
Maybe kids would have it as their only 'puter. But Dad or Mom need a laptop or desktop to sync up the iPad. Just as with an iPod, you need another computer to sync and transfer content to the iPad. Since getting mine, I rarely use the desktop. The laptop gets use mainly to sync up the iPad. And it's two-way. Most of my email from multiple accounts is received and read on my iPad. Also many documents from the internet (yes there are apps for downloading). I'm a heavy computer user, having programmed them since the 1960s, and I have an iPad. As for keyboards, there are several physical keyboard types offered, including Bluetooth wireless keyboards.