Currently working on a marketplace platform, not too sure if I will waste a lot of my time building a nice desktop platform over an app initially? Intentions are to build a native app following launch... But as a strategic move, I am thinking of building a desktop web-platform first. What advice and thoughts do you have on this please?
This decision depends primarily on your market and the specific needs.
Outside of knowing this key element, my initial reaction is that building a web application that is mobile friendly is a great option to start. If native apps (for various platforms) are desired to continue building your client base, then you can come in well informed from your base web application.