The selection choice depends on factors like what you need it for, what are the functions you want to do with that, how much you want to spend for that, which one you feel comfortable and convenient carry around.
If your work is t be done in the office or home then you need to take a laptop, or even a desktop. If you have more activity that needs a mobile or tablet and less of those typing, editing, printing and mailing works, then you need a laptab. However if you need some heavy jobs and also want to store a lot of files and retrieve them frequently, modify and edit them again for further uses, then a laptop is convenient.
If you r activity involves more of whatsapp,fb and other social media ,surfing net and telephone calls and occasional office work like letters, emails then laptab is optimum.
There are quite affordable laptabs now with the best combinations of tablets and PCs like office suites and other software applications. There are convertibles and detachable. Firms like proprietary firm without employees ad self employed people can use them. Some of them come with sufficient storage space also. Otherwise also you can have an external storage also.
There are also touch screen laptops with android and/or windows OS .
However a word of caution here. I have used a touchscren laptop. The touch screen got problem. Even though I consulted a many laptopservice centres none could repair that. I approached the manufacturer and his authorised service centre. They dilly dallied an after some time quoted a price almost 75% of the original laptop price for a replacement touch screen display.(For the same amount I can get a good new laptop without touch) Though I asked for replacement without touch, they said it was not possible.
So what I suggest is if you have a good smartphone with all important functionalities , it is better you go for an affordable laptop without touch, but with good storage space and latest OS.
However if you decide to go for a laptab ,now go for one with 4G facility also.