Now that I&#x27;ve used the SP4 for a good 30 minutes, I&#x27;ve changed my opinion. The new SP4 type cover is vastly improved over the old one. I could use it as my primary input device.<p>In fact, I think it&#x27;s actually a problem for MS! :) The reason why the Surface Book was so appealing was partly because the keyboard&#x2F;trackpad just wasn&#x27;t that great with the SP3. Now that they&#x27;ve improved the type cover so much, the SB seems less necessary.