The Kickstarter is only for the physical stuff. Making games run on newer versions of Windows was done by GOG.com and will be released even if Kickstarter fails.
GOG has been selling current games in addition to the "good old games" for a long time now
GOG has never been an "abandonware" site. Everything on GOG has always been appropriately licensed from the IP owners. The early focus was digital distribution of out-of-print titles (hence the original name "Good Old Games"), but it has always been a retail storefront.