In that case they should send some free dev kits to developers, because most are not going to be interested in spending $3500 on top of their paid Apple develop

In that case they should send some free dev kits to developers, because most are not going to be interested in spending $3500 on top of their paid Apple developer license for the privilege of feathering Apple's gilded moat. AVP is not a general purpose device in the way the iPhone was. The viability of apps for this market is nowhere near proven.