Congrats on your new tech acquisitions. I use an old notebook but with a proper keyboard plugged in via USB. I've written two books with a word-count of 103 000 and 35 000 words, in my own four-fingered style, and much general writing to boot, some of it commercially published, so I agree with Gyppo regarding writing comfort. And I'm quite fussy about the layout and button spacing on the actual keyboard; after that I don't mind too much about the pie crumbs and beer drops. Personally, I can't stand laptops and their silly keyboards for extended writing - I want something bashable.
I'm also dubious about microwave generators on laps. There's plenty of solid research online about what this does to young ovaries and gonads etc. so it's not a recommended example to be setting and is banned in schools in some countries, I think. WiFi is plain nasty to organic life but happily one of the effects seems to be not worrying about it too much.