The future is clearly cross platform where you meet the customer where they are...mobile, desktop, web. Maybe the application morphs a bit by including or excluding features for various platforms but there is no way to proclaim that there is one platform you can focus on to the exclusion of others in a general sense.

If I'm writing serious business software the web and desktop are king and quickly becoming synonymous given technologies like xamarin forms, ionic, and electron. I'm building an app in ionic using html/css/JavaScript (angular) that is primarily for desktop (electron) but will deploy to mobile and web, allowing me to meet people where and how they want to work.