I've written about it as an aspiration in the future as interacting directly with the drawing itself has so many merits.
We are however limited in what technological resources are availableand affordable to us.
Some bulletpoints to summarise my thoughts to date:
- Laptops have small screens so a lot of zooming in and out will be needed. Apple have this action downpat with the two finger pinch but not many others are yet to develop the screen interactive software to match apple (although HP's fully integrated PC's do come close)
- Screen real estate is also a big issue. Revit has a huge quantity of on screen tool icons which take up most of the screen. Leaving very little space for modelling your work. It really needs at least 2 x 27' screens. One for drawing, one for the properties windows and project browser windows.
- Fingers are really fat, which is not ideal for precision work. So picking an exact position on screen is far harder than using a mouse's crosshair or the tip of a pen.
- Lag is a big issue. Namely the time difference between when you draw a line on the screen and the computer identifies the screen interaction, processes and draws that line on screen. The newish Ipad pro and ipen/istylus (whatever) stated they made huge improvements in this, but a quick visit to an apple store will prove this to be bullshit.
- Laptop's are fine for 2D work but buying an affordable laptop that can handle a complex Revit 3D BIM model and linked consultant models is impossible. Revit needs beefy processors and powerful gpus and most companies will not invest the money required in expensive laptops because they are ignorant to the downtime that comes along with slow computers.
Hope this helps!
__________I'm the guy they come to when they didn't follow my recommended workflows.__________