Portable devices such as tablets and smartphones are great for consuming web content. But, they are absolute crap for creating content.
I have an Ultrabook and absolutely love it.
The battery lasts a loooong time, it’s super light, it has a large screen, a keyboard, multiple USB connectors, an SSD, wi-fi, and runs all of my Windows applications. I’m able to run Office, Visual Studio, Paint.NET, and SQL server.
You can give up your PC if you want. But, I’ll be happy to keep mine.